What is difference in this pattern?

William Torrez Corea <[email protected]>
Newsgroups gmane.comp.lang.perl.beginners
Message-ID <CAGiORHdXR3UDPusWPSGOGQ3mPZdyStQDwUFF-Of-VHFi2iDOUQ@mail.gmail.com> 
1. $foo =~ m/abc/
2. $foo =~ m<abc>
3. $foo =~ m'abc'

-- 

With kindest regards, William.

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