(grep-regexp-alist): Use `.+?' instead of `[^:\n]+'.

(grep-regexp-alist): Use `.+?' instead of `[^:\n]+'.
(grep-mode-font-lock-keywords): Use `.+?' instead of `[^\n-]+'.
(grep-error-face): Set to `compilation-error' instead of
`compilation-error-face' (which is redefined to `grep-hit-face' in
grep buffers).
(grep-mode-font-lock-keywords): Remove `-text' from face
variable names.  Use `grep-error-face' instead of
`compilation-error-text-face'.