discrepancy in --doc output between standard/RAKUAST

[coke]

Found in the raku/doc repository, this test fails, meaning there is a difference in the output between RAKUAST and non --doc processing:

RAKUDO_AST_DOCS=v xt/rakuast-compare.rakutest doc/Language/regexes.rakudoc
1..1
not ok 1 - doc/Language/regexes.rakudoc contents match
# Failed test 'doc/Language/regexes.rakudoc contents match'
# at xt/rakuast-compare.rakutest line 43
--- /var/folders/8n/rypl9_990b9578zd5435pgr40000gn/T/nXmOYXiJga	2024-03-05 08:04:07
+++ /var/folders/8n/rypl9_990b9578zd5435pgr40000gn/T/O_hjAgK0hl	2024-03-05 08:04:07
@@ -2796,7 +2796,7 @@
     Disable backtracking: :

 The : metacharacter disables backtracking for the previous atom. Thus, /
-.*: a/ does not match " a" because the .* matches the entire string,
+.*: a/ does not match "  a" because the .* matches the entire string,
 leaving nothing for the a to match without backtracking.

     Enable greedy backtracking: :!
# You failed 1 test of 1

The original rakudoc source is:

The C<:> metacharacter disables backtracking for the previous atom.  Thus,
C</ .*: a/> does not match C<"  a"> because the C<.*> matches the entire string,
leaving nothing for the C<a> to match without backtracking.

Note that on the second line, the C<" a"> has two spaces before the a; the old version renders a single space, the new version renders both.

[lizmat]

Feels to me the old renderer is wrong?

[coke]

Seems so - if this is "fixed when RakuAST lands", I'm OK with that.