http://www.perlmonks.org?node_id=25754

in reply to String Literals in Perl

A fine node with one mistake:

print 'blah\\blah',"\n";

prints "blah\blah". To put a literal \ in a Perl single-quoted string, you should use \\, just like with double-quoted strings. If the character after a \ (in a single-quoted string) doesn't happen to be ' or \, then the \ is preserved. But using this fact often leads to confusion like the mistake in your post, so I discourage people from doing that.

I really wish Perl had used '' (two adjacents 's) to quote ' inside of 's. But my time machine is broken.