@ -33,7 +33,7 @@ Perl classes:
\d Match any digit character ([0-9])
\D Match any non-digit character ([^0-9])
\w Match any word character ([a-zA-Z0-9_])
\W Match any word character ([^a-zA-Z0-9_])
\W Match any non-word character ([^a-zA-Z0-9_])
\s Match any whitespace character ([ \t\n])
\S Match any non-whitespace character ([^ \t\n])