bug#8084: 24.0.50; Grep output not usable in Ubuntu

[Glenn Morris]

Lars Ingebrigtsen wrote:

> But does Emacs bypass the shell alias settings?

It just calls the executable, without going through the shell.

> (global-font-lock-mode -1)

Probably grep-process-setup should also test font-lock status before
enabling color.

I did notice that the help-echo and mouse-face properties will also be
lost without font-lock though.