You have a minor problem with your explinaiton, from perlreref 
This one works differently from normal strings:

   \b  An assertion, not backspace, except in a character class

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In regular expressions \b matches word boundries.

In reply to Re^2: What does belg4mit's signature do? by Ven'Tatsu
in thread What does belg4mit's signature do? by Anonymous Monk

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