Merge branch 'master' of https://github.com/mlochbaum/BQN

11 files changed, 174 insertions, 181 deletions

diff --git a/docs/help/atop.html b/docs/help/atop.html
index deef0cff..81c1d3c6 100644
--- a/docs/help/atop.html
+++ b/docs/help/atop.html
@@ -16,7 +16,7 @@
 </pre>
 <h2 id="---dyadic-atop"><a class="header" href="#---dyadic-atop"><code><span class='Value'>𝕨</span> <span class='Function'>𝔽</span><span class='Modifier2'>∘</span><span class='Function'>𝔾</span> <span class='Value'>𝕩</span></code>: Dyadic Atop</a></h2>
 <p>Apply <code><span class='Function'>𝔾</span></code> to <code><span class='Value'>𝕨</span></code> and <code><span class='Value'>𝕩</span></code>, then apply <code><span class='Function'>𝔽</span></code> (<code><span class='Function'>𝔽</span> <span class='Paren'>(</span><span class='Value'>𝕨</span> <span class='Function'>𝔾</span> <span class='Value'>𝕩</span><span class='Paren'>)</span></code>).</p>
-<p>#<code><span class='Function'>𝔽</span></code> must be monadic, and <code><span class='Function'>𝔾</span></code> must be dyadic.</p>
+<p><code><span class='Function'>𝔽</span></code> must be monadic, and <code><span class='Function'>𝔾</span></code> must be dyadic.</p>
 <a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICAgMSAt4oiYKyAyCgogICAxIC0gKyAyCgogICAtIDEgKyAy">↗️</a><pre>       <span class='Number'>1</span> <span class='Function'>-</span><span class='Modifier2'>∘</span><span class='Function'>+</span> <span class='Number'>2</span>
 ¯3
 
diff --git a/docs/help/enclose_lessthan.html b/docs/help/enclose_lessthan.html
index 7bd6bf84..cad7cc59 100644
--- a/docs/help/enclose_lessthan.html
+++ b/docs/help/enclose_lessthan.html
@@ -5,15 +5,14 @@
 </head>
 <div class="nav">(<a href="https://github.com/mlochbaum/BQN">github</a>) / <a href="../index.html">BQN</a> / <a href="index.html">help</a></div>
 <h1 id="lesser-than-"><a class="header" href="#lesser-than-">Lesser Than (<code><span class='Function'>&lt;</span></code>)</a></h1>
-<h2 id="--enclose--"><a class="header" href="#--enclose--"><code><span class='Function'>&lt;</span> <span class='Value'>𝕩</span></code>: Enclose</a></h2>
+<h2 id="--enclose"><a class="header" href="#--enclose"><code><span class='Function'>&lt;</span> <span class='Value'>𝕩</span></code>: Enclose</a></h2>
 <p>Create a unit array containing <code><span class='Value'>𝕩</span></code>. (<code><span class='Paren'>(</span><span class='Function'>≢</span><span class='Value'>𝕩</span><span class='Paren'>)</span> <span class='Function'>≡</span> <span class='Bracket'>⟨⟩</span></code>)</p>
 <a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICA8MQoKCiAg4omiPDE=">↗️</a><pre>      <span class='Function'>&lt;</span><span class='Number'>1</span>
 ┌·   
 · 1  
     ┘
 
-    
-<span class='Error'>Error: Empty program</span>
+
       <span class='Function'>≢&lt;</span><span class='Number'>1</span>
 ⟨⟩
 </pre>
diff --git a/docs/help/index.html b/docs/help/index.html
index cae6b620..12b1abc2 100644
--- a/docs/help/index.html
+++ b/docs/help/index.html
@@ -3,7 +3,7 @@
   <link href="../style.css" rel="stylesheet"/>
   <title>BQN: REPL Help</title>
 </head>
-<div class="nav">(<a href="https://github.com/mlochbaum/BQN">github</a>) / <a href="../index.html">BQN</a> / <a href="index.html">help</a></div>
+<div class="nav">(<a href="https://github.com/mlochbaum/BQN">github</a>) / <a href="../index.html">BQN</a></div>
 <h1 id="repl-help"><a class="header" href="#repl-help">REPL Help</a></h1>
 <table>
 <thead>
@@ -15,259 +15,259 @@
 <tbody>
 <tr>
 <td><code><span class='Function'>|</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/absolutevalue_modulus.html">Absolute Value, Modulus</a></td>
+<td><a href="absolutevalue_modulus.html">Absolute Value, Modulus</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⟜</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/after_bind.html">Bind, After, Dyadic After</a></td>
+<td><a href="after_bind.html">Bind, After, Dyadic After</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>!</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/assert_assertwithmessage.html">Assert, Dyad</a></td>
+<td><a href="assert_assertwithmessage.html">Assert, Dyad</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>∘</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/atop.html">Atop, Dyadic Atop</a></td>
+<td><a href="atop.html">Atop, Dyadic Atop</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⊸</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/before_bind.html">Bind Left, Before, Dyadic Before</a></td>
+<td><a href="before_bind.html">Bind Left, Before, Dyadic Before</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⎊</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/catch.html">Catch</a></td>
+<td><a href="catch.html">Catch</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⌈</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/ceiling_maximum.html">Ceiling, Maximum</a></td>
+<td><a href="ceiling_maximum.html">Ceiling, Maximum</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>˘</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/cells.html">Cells</a></td>
+<td><a href="cells.html">Cells</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>◶</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/choose.html">Choose</a></td>
+<td><a href="choose.html">Choose</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊐</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/classify_indexof.html">Classify, Index Of</a></td>
+<td><a href="classify_indexof.html">Classify, Index Of</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>+</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/conjugate_add.html">Conjugate, Add</a></td>
+<td><a href="conjugate_add.html">Conjugate, Add</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>˙</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/constant.html">Constant</a></td>
+<td><a href="constant.html">Constant</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⍷</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/deduplicate_find.html">Deduplicate, Find</a></td>
+<td><a href="deduplicate_find.html">Deduplicate, Find</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>≡</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/depth_match.html">Depth, Match</a></td>
+<td><a href="depth_match.html">Depth, Match</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⚇</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/depth.html">Depth</a></td>
+<td><a href="depth.html">Depth</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⥊</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/deshape_reshape.html">Deshape, Reshape</a></td>
+<td><a href="deshape_reshape.html">Deshape, Reshape</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>¨</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/each.html">Each</a></td>
+<td><a href="each.html">Each</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>&lt;</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/enclose_lessthan.html">Enclose, Lesser Than</a></td>
+<td><a href="enclose_lessthan.html">Enclose, Lesser Than</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⋈</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/enlist_pair.html">Enlist, Pair</a></td>
+<td><a href="enlist_pair.html">Enlist, Pair</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⋆</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/exponential_power.html">Exponential, Power</a></td>
+<td><a href="exponential_power.html">Exponential, Power</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊏</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/firstcell_select.html">First Cell, Select</a></td>
+<td><a href="firstcell_select.html">First Cell, Select</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊑</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/first_pick.html">First, Pick</a></td>
+<td><a href="first_pick.html">First, Pick</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⌊</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/floor_minimum.html">Floor, Minimum</a></td>
+<td><a href="floor_minimum.html">Floor, Minimum</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>´</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/fold.html">Fold, Fold With initial</a></td>
+<td><a href="fold.html">Fold, Fold With initial</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⍒</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/gradedown_binsdown.html">Grade Down, Bins Down</a></td>
+<td><a href="gradedown_binsdown.html">Grade Down, Bins Down</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⍋</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/gradeup_binsup.html">Grade Up, Bins Up</a></td>
+<td><a href="gradeup_binsup.html">Grade Up, Bins Up</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>≥</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/greaterthanorequalto.html">Greater Than or Equal To</a></td>
+<td><a href="greaterthanorequalto.html">Greater Than or Equal To</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊔</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/groupindices_group.html">Group Indices, Group</a></td>
+<td><a href="groupindices_group.html">Group Indices, Group</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊣</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/identity_left.html">Identity, Left</a></td>
+<td><a href="identity_left.html">Identity, Left</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊢</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/identity_right.html">Identity, Right</a></td>
+<td><a href="identity_right.html">Identity, Right</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>/</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/indices_replicate.html">Indices, Replicate</a></td>
+<td><a href="indices_replicate.html">Indices, Replicate</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>˝</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/insert.html">Insert, Insert With initial</a></td>
+<td><a href="insert.html">Insert, Insert With initial</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>∾</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/join_jointo.html">Join, Join</a></td>
+<td><a href="join_jointo.html">Join, Join</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>≠</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/length_notequals.html">Length, Not Equal To</a></td>
+<td><a href="length_notequals.html">Length, Not Equal To</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>≤</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/lessthanorequalto.html">Lesser Than or Equal To</a></td>
+<td><a href="lessthanorequalto.html">Lesser Than or Equal To</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>∊</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/markfirst_memberof.html">Unique Mask, Member Of</a></td>
+<td><a href="markfirst_memberof.html">Unique Mask, Member Of</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>&gt;</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/merge_greaterthan.html">Merge, Greater Than</a></td>
+<td><a href="merge_greaterthan.html">Merge, Greater Than</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>-</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/negate_subtract.html">Negate, Subtract</a></td>
+<td><a href="negate_subtract.html">Negate, Subtract</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>¬</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/not_span.html">Logical Not, Span</a></td>
+<td><a href="not_span.html">Logical Not, Span</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⊒</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/occurrencecount_progressiveindexof.html">Occurrence Count, Progressive Index Of</a></td>
+<td><a href="occurrencecount_progressiveindexof.html">Occurrence Count, Progressive Index Of</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>○</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/over.html">Atop, Over</a></td>
+<td><a href="over.html">Atop, Over</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>↑</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/prefixes_take.html">Prefixes, Take</a></td>
+<td><a href="prefixes_take.html">Prefixes, Take</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>↕</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/range_windows.html">Range, Windows</a></td>
+<td><a href="range_windows.html">Range, Windows</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>=</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/rank_equals.html">Rank, Equal To</a></td>
+<td><a href="rank_equals.html">Rank, Equal To</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⎉</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/rank.html">Rank</a></td>
+<td><a href="rank.html">Rank</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>÷</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/reciprocal_divide.html">Reciprocal, Divide</a></td>
+<td><a href="reciprocal_divide.html">Reciprocal, Divide</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⍟</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/repeat.html">Repeat</a></td>
+<td><a href="repeat.html">Repeat</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⌽</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/reverse_rotate.html">Reverse, Dyad</a></td>
+<td><a href="reverse_rotate.html">Reverse, Dyad</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>`</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/scan.html">Scan, Scan With initial</a></td>
+<td><a href="scan.html">Scan, Scan With initial</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>˜</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/self_swap.html">Self, Swap</a></td>
+<td><a href="self_swap.html">Self, Swap</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>≢</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/shape_notmatch.html">Shape, Not Match</a></td>
+<td><a href="shape_notmatch.html">Shape, Not Match</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>»</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/shiftafter.html">Shift After, Shift After</a></td>
+<td><a href="shiftafter.html">Shift After, Shift After</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>«</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/shiftbefore.html">Shift Before, Shift Before</a></td>
+<td><a href="shiftbefore.html">Shift Before, Shift Before</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>×</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/sign_multiply.html">Sign, Multiply</a></td>
+<td><a href="sign_multiply.html">Sign, Multiply</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>≍</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/solo_couple.html">Solo, Couple</a></td>
+<td><a href="solo_couple.html">Solo, Couple</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>∨</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/sortdown_or.html">Sort Down, Logical Or</a></td>
+<td><a href="sortdown_or.html">Sort Down, Logical Or</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>∧</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/sortup_and.html">Sort Up, Logical And</a></td>
+<td><a href="sortup_and.html">Sort Up, Logical And</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>√</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/squareroot_root.html">Square root, Root</a></td>
+<td><a href="squareroot_root.html">Square root, Root</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>↓</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/suffixes_drop.html">Suffixes, Drop</a></td>
+<td><a href="suffixes_drop.html">Suffixes, Drop</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>⌜</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/table.html">Each</a></td>
+<td><a href="table.html">Each</a></td>
 </tr>
 <tr>
 <td><code><span class='Function'>⍉</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/transpose_reorderaxes.html">Transpose, Reorder Axes</a></td>
+<td><a href="transpose_reorderaxes.html">Transpose, Reorder Axes</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⌾</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/under.html">Under</a></td>
+<td><a href="under.html">Under</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier'>⁼</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/undo.html">Undo</a></td>
+<td><a href="undo.html">Undo</a></td>
 </tr>
 <tr>
 <td><code><span class='Modifier2'>⊘</span></code></td>
-<td><a href="https://mlochbaum.github.io/BQN/help/valences.html">Valences, Dyadic Valences</a></td>
+<td><a href="valences.html">Valences, Dyadic Valences</a></td>
 </tr>
 </tbody>
 </table>
diff --git a/docs/help/solo_couple.html b/docs/help/solo_couple.html
index 7c663d1a..5af4506b 100644
--- a/docs/help/solo_couple.html
+++ b/docs/help/solo_couple.html
@@ -5,34 +5,30 @@
 </head>
 <div class="nav">(<a href="https://github.com/mlochbaum/BQN">github</a>) / <a href="../index.html">BQN</a> / <a href="index.html">help</a></div>
 <h1 id="tape-"><a class="header" href="#tape-">Tape (<code><span class='Function'>≍</span></code>)</a></h1>
-<h2 id="--solo-"><a class="header" href="#--solo-"><code><span class='Function'>≍</span> <span class='Value'>𝕩</span></code>: Solo</a></h2>
+<h2 id="--solo"><a class="header" href="#--solo"><code><span class='Function'>≍</span> <span class='Value'>𝕩</span></code>: Solo</a></h2>
 <p>Add a dimension to <code><span class='Value'>𝕩</span></code>.</p>
-<a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICDiiY0gMQoKICAKICDiiY3iiY0gMQoKICAKIOKJjeKJjeKJjSAxCgogIAog4omN4omNIDHigL8y4oC/M+KAvzQKCiAgCiDiiY3iiY3iiY0gMeKAvzLigL8z4oC/NA==">↗️</a><pre>      <span class='Function'>≍</span> <span class='Number'>1</span>
+<a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICDiiY0gMQoKCiAg4omN4omNIDEKCgog4omN4omN4omNIDEKCgog4omN4omNIDHigL8y4oC/M+KAvzQKCgog4omN4omN4omNIDHigL8y4oC/M+KAvzQ=">↗️</a><pre>      <span class='Function'>≍</span> <span class='Number'>1</span>
 ⟨ 1 ⟩
 
-      
-<span class='Error'>Error: Empty program</span>
+
       <span class='Function'>≍≍</span> <span class='Number'>1</span>
 ┌─   
 ╵ 1  
     ┘
 
-      
-<span class='Error'>Error: Empty program</span>
+
      <span class='Function'>≍≍≍</span> <span class='Number'>1</span>
 ┌─   
 ╎ 1  
     ┘
 
-      
-<span class='Error'>Error: Empty program</span>
+
      <span class='Function'>≍≍</span> <span class='Number'>1</span><span class='Ligature'>‿</span><span class='Number'>2</span><span class='Ligature'>‿</span><span class='Number'>3</span><span class='Ligature'>‿</span><span class='Number'>4</span>
 ┌─         
 ╎ 1 2 3 4  
           ┘
 
-      
-<span class='Error'>Error: Empty program</span>
+
      <span class='Function'>≍≍≍</span> <span class='Number'>1</span><span class='Ligature'>‿</span><span class='Number'>2</span><span class='Ligature'>‿</span><span class='Number'>3</span><span class='Ligature'>‿</span><span class='Number'>4</span>
 ┌─         
 ┆ 1 2 3 4  
diff --git a/docs/help/under.html b/docs/help/under.html
index eb83dd3e..f923f27e 100644
--- a/docs/help/under.html
+++ b/docs/help/under.html
@@ -12,8 +12,10 @@
 <li>Undo transformation <code><span class='Function'>𝔾</span></code></li>
 </ul>
 <p>Where <code><span class='Function'>𝔾</span></code> must be</p>
-<p>1. A function invertible by <code><span class='Modifier'>⁼</span></code> (Undo)
-2. A structural modification</p>
+<ul>
+<li>A function invertible by <code><span class='Modifier'>⁼</span></code> (Undo)</li>
+<li>A structural modification</li>
+</ul>
 <a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICAgOeKMvigx4oq44oqRKSAx4oC/MuKAvzMKCiAgIOKImuKBvCAo4oiaMSkgKyAo4oiaOSkKCiAgIDEgK+KMvuKImiA5">↗️</a><pre>       <span class='Number'>9</span><span class='Modifier2'>⌾</span><span class='Paren'>(</span><span class='Number'>1</span><span class='Modifier2'>⊸</span><span class='Function'>⊑</span><span class='Paren'>)</span> <span class='Number'>1</span><span class='Ligature'>‿</span><span class='Number'>2</span><span class='Ligature'>‿</span><span class='Number'>3</span>
 ⟨ 1 9 3 ⟩
 
diff --git a/help/README.md b/help/README.md
new file mode 100644
index 00000000..2d6d3cf1
--- /dev/null
+++ b/help/README.md
@@ -0,0 +1,70 @@
+*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/index.html).*
+
+# REPL Help
+
+| Symbol | Link |
+|--------|------|
+| `\|` | [Absolute Value, Modulus](absolutevalue_modulus.md) |
+| `⟜` | [Bind, After, Dyadic After](after_bind.md) |
+| `!` | [Assert, Dyad](assert_assertwithmessage.md) |
+| `∘` | [Atop, Dyadic Atop](atop.md) |
+| `⊸` | [Bind Left, Before, Dyadic Before](before_bind.md) |
+| `⎊` | [Catch](catch.md) |
+| `⌈` | [Ceiling, Maximum](ceiling_maximum.md) |
+| `˘` | [Cells](cells.md) |
+| `◶` | [Choose](choose.md) |
+| `⊐` | [Classify, Index Of](classify_indexof.md) |
+| `+` | [Conjugate, Add](conjugate_add.md) |
+| `˙` | [Constant](constant.md) |
+| `⍷` | [Deduplicate, Find](deduplicate_find.md) |
+| `≡` | [Depth, Match](depth_match.md) |
+| `⚇` | [Depth](depth.md) |
+| `⥊` | [Deshape, Reshape](deshape_reshape.md) |
+| `¨` | [Each](each.md) |
+| `<` | [Enclose, Lesser Than](enclose_lessthan.md) |
+| `⋈` | [Enlist, Pair](enlist_pair.md) |
+| `⋆` | [Exponential, Power](exponential_power.md) |
+| `⊏` | [First Cell, Select](firstcell_select.md) |
+| `⊑` | [First, Pick](first_pick.md) |
+| `⌊` | [Floor, Minimum](floor_minimum.md) |
+| `´` | [Fold, Fold With initial](fold.md) |
+| `⍒` | [Grade Down, Bins Down](gradedown_binsdown.md) |
+| `⍋` | [Grade Up, Bins Up](gradeup_binsup.md) |
+| `≥` | [Greater Than or Equal To](greaterthanorequalto.md) |
+| `⊔` | [Group Indices, Group](groupindices_group.md) |
+| `⊣` | [Identity, Left](identity_left.md) |
+| `⊢` | [Identity, Right](identity_right.md) |
+| `/` | [Indices, Replicate](indices_replicate.md) |
+| `˝` | [Insert, Insert With initial](insert.md) |
+| `∾` | [Join, Join](join_jointo.md) |
+| `≠` | [Length, Not Equal To](length_notequals.md) |
+| `≤` | [Lesser Than or Equal To](lessthanorequalto.md) |
+| `∊` | [Unique Mask, Member Of](markfirst_memberof.md) |
+| `>` | [Merge, Greater Than](merge_greaterthan.md) |
+| `-` | [Negate, Subtract](negate_subtract.md) |
+| `¬` | [Logical Not, Span](not_span.md) |
+| `⊒` | [Occurrence Count, Progressive Index Of](occurrencecount_progressiveindexof.md) |
+| `○` | [Atop, Over](over.md) |
+| `↑` | [Prefixes, Take](prefixes_take.md) |
+| `↕` | [Range, Windows](range_windows.md) |
+| `=` | [Rank, Equal To](rank_equals.md) |
+| `⎉` | [Rank](rank.md) |
+| `÷` | [Reciprocal, Divide](reciprocal_divide.md) |
+| `⍟` | [Repeat](repeat.md) |
+| `⌽` | [Reverse, Dyad](reverse_rotate.md) |
+| `` ` `` | [Scan, Scan With initial](scan.md) |
+| `˜` | [Self, Swap](self_swap.md) |
+| `≢` | [Shape, Not Match](shape_notmatch.md) |
+| `»` | [Shift After, Shift After](shiftafter.md) |
+| `«` | [Shift Before, Shift Before](shiftbefore.md) |
+| `×` | [Sign, Multiply](sign_multiply.md) |
+| `≍` | [Solo, Couple](solo_couple.md) |
+| `∨` | [Sort Down, Logical Or](sortdown_or.md) |
+| `∧` | [Sort Up, Logical And](sortup_and.md) |
+| `√` | [Square root, Root](squareroot_root.md) |
+| `↓` | [Suffixes, Drop](suffixes_drop.md) |
+| `⌜` | [Each](table.md) |
+| `⍉` | [Transpose, Reorder Axes](transpose_reorderaxes.md) |
+| `⌾` | [Under](under.md) |
+| `⁼` | [Undo](undo.md) |
+| `⊘` | [Valences, Dyadic Valences](valences.md) |
diff --git a/help/atop.md b/help/atop.md
index 525c4800..d936450e 100644
--- a/help/atop.md
+++ b/help/atop.md
@@ -18,7 +18,7 @@ Apply `𝔾` to `𝕩`, then apply `𝔽` (`𝔽 𝔾 𝕩`).
     
 Apply `𝔾` to `𝕨` and `𝕩`, then apply `𝔽` (`𝔽 (𝕨 𝔾 𝕩)`).
     
-#`𝔽` must be monadic, and `𝔾` must be dyadic.
+`𝔽` must be monadic, and `𝔾` must be dyadic.
     
            1 -∘+ 2
 
diff --git a/help/enclose_lessthan.md b/help/enclose_lessthan.md
index 668318cd..d584584f 100644
--- a/help/enclose_lessthan.md
+++ b/help/enclose_lessthan.md
@@ -1,27 +1,25 @@
 *View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/enclose_lessthan.html).*
 
 # Lesser Than (`<`)
-    
-## `< 𝕩`: Enclose  
-    
+
+## `< 𝕩`: Enclose
+
 Create a unit array containing `𝕩`. (`(≢𝕩) ≡ ⟨⟩`)
-    
-    
+
+
           <1
 
-        
+
           ≢<1
 
-    
-    
+
+
 ## `𝕨 < 𝕩`: Lesser Than
-    
+
 `𝕨` and `𝕩` can both be either numbers or characters.
-    
+
 [Pervasive.](https://mlochbaum.github.io/BQN/doc/arithmetic.html#pervasion)
-    
+
           1 < 3
 
           2‿3‿0 < 3‿1‿0
-
-    
diff --git a/help/index.md b/help/index.md
deleted file mode 100644
index 8a0f2c1b..00000000
--- a/help/index.md
+++ /dev/null
@@ -1,70 +0,0 @@
-*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/index.html).*
-
-# REPL Help
-
-| Symbol | Link |
-|--------|------|
-| `\|` | [Absolute Value, Modulus](https://mlochbaum.github.io/BQN/help/absolutevalue_modulus.html) |
-| `⟜` | [Bind, After, Dyadic After](https://mlochbaum.github.io/BQN/help/after_bind.html) |
-| `!` | [Assert, Dyad](https://mlochbaum.github.io/BQN/help/assert_assertwithmessage.html) |
-| `∘` | [Atop, Dyadic Atop](https://mlochbaum.github.io/BQN/help/atop.html) |
-| `⊸` | [Bind Left, Before, Dyadic Before](https://mlochbaum.github.io/BQN/help/before_bind.html) |
-| `⎊` | [Catch](https://mlochbaum.github.io/BQN/help/catch.html) |
-| `⌈` | [Ceiling, Maximum](https://mlochbaum.github.io/BQN/help/ceiling_maximum.html) |
-| `˘` | [Cells](https://mlochbaum.github.io/BQN/help/cells.html) |
-| `◶` | [Choose](https://mlochbaum.github.io/BQN/help/choose.html) |
-| `⊐` | [Classify, Index Of](https://mlochbaum.github.io/BQN/help/classify_indexof.html) |
-| `+` | [Conjugate, Add](https://mlochbaum.github.io/BQN/help/conjugate_add.html) |
-| `˙` | [Constant](https://mlochbaum.github.io/BQN/help/constant.html) |
-| `⍷` | [Deduplicate, Find](https://mlochbaum.github.io/BQN/help/deduplicate_find.html) |
-| `≡` | [Depth, Match](https://mlochbaum.github.io/BQN/help/depth_match.html) |
-| `⚇` | [Depth](https://mlochbaum.github.io/BQN/help/depth.html) |
-| `⥊` | [Deshape, Reshape](https://mlochbaum.github.io/BQN/help/deshape_reshape.html) |
-| `¨` | [Each](https://mlochbaum.github.io/BQN/help/each.html) |
-| `<` | [Enclose, Lesser Than](https://mlochbaum.github.io/BQN/help/enclose_lessthan.html) |
-| `⋈` | [Enlist, Pair](https://mlochbaum.github.io/BQN/help/enlist_pair.html) |
-| `⋆` | [Exponential, Power](https://mlochbaum.github.io/BQN/help/exponential_power.html) |
-| `⊏` | [First Cell, Select](https://mlochbaum.github.io/BQN/help/firstcell_select.html) |
-| `⊑` | [First, Pick](https://mlochbaum.github.io/BQN/help/first_pick.html) |
-| `⌊` | [Floor, Minimum](https://mlochbaum.github.io/BQN/help/floor_minimum.html) |
-| `´` | [Fold, Fold With initial](https://mlochbaum.github.io/BQN/help/fold.html) |
-| `⍒` | [Grade Down, Bins Down](https://mlochbaum.github.io/BQN/help/gradedown_binsdown.html) |
-| `⍋` | [Grade Up, Bins Up](https://mlochbaum.github.io/BQN/help/gradeup_binsup.html) |
-| `≥` | [Greater Than or Equal To](https://mlochbaum.github.io/BQN/help/greaterthanorequalto.html) |
-| `⊔` | [Group Indices, Group](https://mlochbaum.github.io/BQN/help/groupindices_group.html) |
-| `⊣` | [Identity, Left](https://mlochbaum.github.io/BQN/help/identity_left.html) |
-| `⊢` | [Identity, Right](https://mlochbaum.github.io/BQN/help/identity_right.html) |
-| `/` | [Indices, Replicate](https://mlochbaum.github.io/BQN/help/indices_replicate.html) |
-| `˝` | [Insert, Insert With initial](https://mlochbaum.github.io/BQN/help/insert.html) |
-| `∾` | [Join, Join](https://mlochbaum.github.io/BQN/help/join_jointo.html) |
-| `≠` | [Length, Not Equal To](https://mlochbaum.github.io/BQN/help/length_notequals.html) |
-| `≤` | [Lesser Than or Equal To](https://mlochbaum.github.io/BQN/help/lessthanorequalto.html) |
-| `∊` | [Unique Mask, Member Of](https://mlochbaum.github.io/BQN/help/markfirst_memberof.html) |
-| `>` | [Merge, Greater Than](https://mlochbaum.github.io/BQN/help/merge_greaterthan.html) |
-| `-` | [Negate, Subtract](https://mlochbaum.github.io/BQN/help/negate_subtract.html) |
-| `¬` | [Logical Not, Span](https://mlochbaum.github.io/BQN/help/not_span.html) |
-| `⊒` | [Occurrence Count, Progressive Index Of](https://mlochbaum.github.io/BQN/help/occurrencecount_progressiveindexof.html) |
-| `○` | [Atop, Over](https://mlochbaum.github.io/BQN/help/over.html) |
-| `↑` | [Prefixes, Take](https://mlochbaum.github.io/BQN/help/prefixes_take.html) |
-| `↕` | [Range, Windows](https://mlochbaum.github.io/BQN/help/range_windows.html) |
-| `=` | [Rank, Equal To](https://mlochbaum.github.io/BQN/help/rank_equals.html) |
-| `⎉` | [Rank](https://mlochbaum.github.io/BQN/help/rank.html) |
-| `÷` | [Reciprocal, Divide](https://mlochbaum.github.io/BQN/help/reciprocal_divide.html) |
-| `⍟` | [Repeat](https://mlochbaum.github.io/BQN/help/repeat.html) |
-| `⌽` | [Reverse, Dyad](https://mlochbaum.github.io/BQN/help/reverse_rotate.html) |
-| `` ` `` | [Scan, Scan With initial](https://mlochbaum.github.io/BQN/help/scan.html) |
-| `˜` | [Self, Swap](https://mlochbaum.github.io/BQN/help/self_swap.html) |
-| `≢` | [Shape, Not Match](https://mlochbaum.github.io/BQN/help/shape_notmatch.html) |
-| `»` | [Shift After, Shift After](https://mlochbaum.github.io/BQN/help/shiftafter.html) |
-| `«` | [Shift Before, Shift Before](https://mlochbaum.github.io/BQN/help/shiftbefore.html) |
-| `×` | [Sign, Multiply](https://mlochbaum.github.io/BQN/help/sign_multiply.html) |
-| `≍` | [Solo, Couple](https://mlochbaum.github.io/BQN/help/solo_couple.html) |
-| `∨` | [Sort Down, Logical Or](https://mlochbaum.github.io/BQN/help/sortdown_or.html) |
-| `∧` | [Sort Up, Logical And](https://mlochbaum.github.io/BQN/help/sortup_and.html) |
-| `√` | [Square root, Root](https://mlochbaum.github.io/BQN/help/squareroot_root.html) |
-| `↓` | [Suffixes, Drop](https://mlochbaum.github.io/BQN/help/suffixes_drop.html) |
-| `⌜` | [Each](https://mlochbaum.github.io/BQN/help/table.html) |
-| `⍉` | [Transpose, Reorder Axes](https://mlochbaum.github.io/BQN/help/transpose_reorderaxes.html) |
-| `⌾` | [Under](https://mlochbaum.github.io/BQN/help/under.html) |
-| `⁼` | [Undo](https://mlochbaum.github.io/BQN/help/undo.html) |
-| `⊘` | [Valences, Dyadic Valences](https://mlochbaum.github.io/BQN/help/valences.html) |
diff --git a/help/solo_couple.md b/help/solo_couple.md
index ac66e5c2..dfee8d18 100644
--- a/help/solo_couple.md
+++ b/help/solo_couple.md
@@ -1,33 +1,31 @@
 *View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/solo_couple.html).*
 
 # Tape (`≍`)
-    
-## `≍ 𝕩`: Solo 
-    
+
+## `≍ 𝕩`: Solo
+
 Add a dimension to `𝕩`.
-    
+
           ≍ 1
 
-          
+
           ≍≍ 1
 
-          
+
          ≍≍≍ 1
 
-          
+
          ≍≍ 1‿2‿3‿4
 
-          
+
          ≍≍≍ 1‿2‿3‿4
 
-    
-    
+
+
 ## `𝕨 ≍ 𝕩`: Couple
-    
+
 Join `𝕨` and `𝕩` along a newly created axis.
-    
+
            1 ≍ 3
 
            1‿2 ≍ 2‿3
-
-    
diff --git a/help/under.md b/help/under.md
index 0eb86091..e811216c 100644
--- a/help/under.md
+++ b/help/under.md
@@ -10,8 +10,8 @@
     
 Where `𝔾` must be 
     
-1. A function invertible by `⁼` (Undo)
-2. A structural modification
+- A function invertible by `⁼` (Undo)
+- A structural modification
     
            9⌾(1⊸⊑) 1‿2‿3