doc: /* Search forward from point for STRING.
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. If nil, it is
+The match found must not extend after that position. A value of nil is
equivalent to (point-max).
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.