(defun grep (command-args &optional highlight-regexp)
"Run grep, with user-specified args, and collect output in a buffer.
While grep runs asynchronously, you can use \\[next-error] (M-x next-error),
-or \\<grep-minor-mode-map>\\[compile-goto-error] in the grep \
+or \\<grep-mode-map>\\[compile-goto-error] in the grep \
output buffer, to go to the lines
where grep found matches.