remove 'o' modifier from Perl regular expressions

[maletin]

without /o the regular expressions are less error-prone.
If you really want the regex to be compiled only once, it's better to use a regex object:
my $reg = qr/foo$bar/;

http://stackoverflow.com/questions/550258/does-the-o-modifier-for-perl-regular-expressions-still-provide-any-benefit

[df7cb]

Closed via b91b2bd, thanks!