These are not technically "comments inside the regexes", that would be something like the "Delete (most) C comments." regex here: https://perldoc.perl.org/perlre#/x-and-/xx
Here, instead, they've used string juxtaposition cleverly to write comments between parts of the regex/string. It effectively serves the same purpose though.
Here, instead, they've used string juxtaposition cleverly to write comments between parts of the regex/string. It effectively serves the same purpose though.