cfunction
(peg/replace-all peg repl text &opt start & args)
Replace all matches of peg in text with repl, returning a new
buffer. The peg does not need to make captures to do replacement.
(peg/replace-all '(set "aiou") "e" "The quick brown fox jumps over the lazy dog")
# returns The qeeck brewn fex jemps ever the lezy deg