Stopgap measure for projects with huge gitignore files.
Stopgap measure for projects with huge gitignore files.

This helps #134 by avoiding a slow regex execution path, but doesn't
actually fix the problem. Namely, we've gone from "so slow I'm not going
to keep waiting for rg to finish" to "wow that was slow but at least it
finished before I lost my patience."

BurntSushi/ripgrep,BurntSushi/ripgrep,BurntSushi/ripgrep,BurntSushi/ripgrep