add h2s remove copied output, ascii filenames

1 files changed, 22 insertions, 0 deletions

diff --git a/help/undo.md b/help/undo.md
new file mode 100644
index 00000000..0daa6469
--- /dev/null
+++ b/help/undo.md
@@ -0,0 +1,22 @@
+*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/undo.html).*
+
+# Superscript Equals Sign (`⁼`)
+    
+## `𝔽⁼ 𝕩`, `𝕨 𝔽⁼ 𝕩`: Undo
+    
+Invert the function `𝔽`, or use its defined inverse. Not all functions have inverses.
+    
+    
+           1 - 2
+
+           1 -⁼ 2
+
+           √ 16
+
+           √⁼ 4
+
+           ⋆ 1
+
+           ⋆⁼ 2.718281828459045
+
+