(defun erc-replace-match-subexpression-in-string
(newtext string match subexp start &optional fixedcase literal)
"Replace the subexpression SUBEXP of the last match in STRING with NEWTEXT.
(defun erc-replace-match-subexpression-in-string
(newtext string match subexp start &optional fixedcase literal)
"Replace the subexpression SUBEXP of the last match in STRING with NEWTEXT.