ggreer/the_silver_searcher — pull request #536 by jpouellet (2014-11-23 02:00:18+00:00)
Title: add -F/--fixed-strings as alias for -Q/--literal

This is the most annoying (to me) muscle-memory difference from grep.
- `-F` matches POSIX [grep(1)](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html)
- `--fixed-strings` matches GNU [grep(1)](https://www.gnu.org/software/grep/manual/grep.html#grep-Programs)