I'm trying to use rvm from within the fish shell
rvm gemset use rails3
I'm getting the following error message from fish
RVM is not a function, selecting rubies with 'rvm use ...' will not work.
You need to change your terminal emulator preferences to allow login shell.
Sometimes it is required to use `/bin/bash --login` as the command.
Please visit https://rvm.io/integration/gnome-terminal/ for an example.
The same command works fine from Bash.
