Remove -l arg from get_shell_path()

Gotta say this is one of the weirdest bugs I've ever seen. What was happening is that none of my linter executables were being found, so I started debugging only to find the string "Marijuana will be legal some day, because the many law students" prepended to my path! WTF!

Well it turns out I have fortune cookies turned on. Maybe that's a default in Ubunutu.

So, anyway. Is it possible to turn off the login shell arg?