easy mistake to make. Perl's documentation is mostly good, but I keep finding I have to look up perlop, perlrequick, perlre and perlretut to get the whole picture for regular expressions and transliterations. Sometimes I think might be nice to have a more distinct syntax for s/// and y/// (or tr///). Although having regex substitutions and transliterations in the same section in the docs kind of makes sense because they do similar things.