Making capital_P_dangit completely wpcamelcase.com compliant

[Latz]

Matt's attempt to extinguish the wrong spelling of WordPress only works with the string "Wordpress" but there are many other ways to spell the word wrongly:

Wordpress, Word Press, wordPress, WORDPRESS, or WoRdPrEsS

(see wpcamelcase.com)

This patch converts all possible spellings to "WordPress".

[nacin]

Thanks for the patch, but we're just looking to handle the uppercase P.

If you are interested in including this in a plugin, I would however suggest that instead of \s*, it instead looks for exactly zero or one space, like ([ ])?. However, this could pick up false positives if the words word and press are adjacent, and it also ignores word boundaries. Looking for case sensitive 'Wordpress' (and, with a patch on #13971, also checking the character before) would produce negligible false positives.