*Note on "word" boundaries: \b in character class will not work!*

Inside a Character Class, like so: [\b], no longer means "word-boundary", 
it means *"match a backspace".* This is why putting short-hands for 
character classes inside character classes is not good practice.  [\w] will 
work as expected, [\b] will not. It can get confusing!

TT

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