(grep-mode-font-lock-keywords): Correct regexps

to recognize mode name containing submodes, such as Grep/lw.

lisp/progmodes/grep.el

@@ -282,13 +282,13 @@ Notice that using \\[next-error] or \\[compile-goto-error] modifies
      (": \\(.+\\): \\(?:Permission denied\\|No such \\(?:file or directory\\|device or address\\)\\)$"
       1 grep-error-face)
      ;; remove match from grep-regexp-alist before fontifying
-     ("^Grep started.*"
+     ("^Grep[/a-zA-z]* started.*"
       (0 '(face nil message nil help-echo nil mouse-face nil) t))
-     ("^Grep finished \\(?:(\\(matches found\\))\\|with \\(no matches found\\)\\).*"
+     ("^Grep[/a-zA-z]* finished \\(?:(\\(matches found\\))\\|with \\(no matches found\\)\\).*"
       (0 '(face nil message nil help-echo nil mouse-face nil) t)
       (1 compilation-info-face nil t)
       (2 compilation-warning-face nil t))
-     ("^Grep \\(exited abnormally\\|interrupt\\|killed\\|terminated\\)\\(?:.*with code \\([0-9]+\\)\\)?.*"
+     ("^Grep[/a-zA-z]* \\(exited abnormally\\|interrupt\\|killed\\|terminated\\)\\(?:.*with code \\([0-9]+\\)\\)?.*"
       (0 '(face nil message nil help-echo nil mouse-face nil) t)
       (1 grep-error-face)
       (2 grep-error-face nil t))