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Special characters (so-called metacharacters) are certain characters with special meanings and have to be escaped with a backslash, if used as literal character.
There are 12 metacharacters, backslash \ is one of them.
(Escaping rules can get tricky. I didn't test the other 11 mCH.)
Last edited by chaot; 01-05-2017 at 11:06 AM.
Reason: delete: it's not that important. [reason: could be misunderstood]
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