I want to mass-edit a ton of files that are returned in a grep. (I know, I should get better at sed).
So if I do:
grep -rnI \'xg_icon-*\'
You can do it without any processing of the grep output! This will even enable you to go the the right line (using :help quickfix commands, eg. :cn or :cw). So, if you are using bash or zsh:
:help quickfix
:cn
:cw
vim -q <(grep foo *.c)