Function: word-search-forward

Search forward from point for STRING, ignoring differences in punctuation.
Set point to the end of the occurrence found, and return point.
An optional second argument bounds the search; it is a buffer position.
The match found must not extend after that position.
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, move to limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.

Relies on the function `word-search-regexp' to convert a sequence
of words in STRING to a regexp used to search words without regard to punctuation.