"canary"
< { -- -- "here: ?" dump } "#?" deffd > /foo /bar ?
_ dump
< { "here: *" dump } "#*" deffd > *
_ dump
< { "here: =[]" dump } "#=[]" deffd > =[]
_ dump
< { "here: len" dump } "#len" deffd > len
_ dump
/foo < { "here: cat (with: " -01 cat ")" cat dump } "#cat" deffd > cat
_ dump
< { "here: -01 cat (with: " -01 cat ")" cat dump } "#-01 cat" deffd > /foo cat
_ dump
< { -- "here: each" dump } "#each" deffd > { "xxx" die } each
_ dump
< { "here: dom" dump } "#dom" deffd > dom
_ dump
< { "here: *" dump } "#*" deffd > 0 !
_ dump