If third arg START is non-nil, start search at that index in STRING.
For index of first char beyond the match, do (match-end 0).
`match-end' and `match-beginning' also give indices of substrings
-matched by parenthesis constructs in the pattern. */)
+matched by parenthesis constructs in the pattern.
+
+You can use the function `match-string' to extract the substrings
+matched by the parenthesis constructions in REGEXP. */)
(regexp, string, start)
Lisp_Object regexp, string, start;
{