add open command to rvm
fix editor option
add bad gem test
fix indentation
fix indentation to 2 spaces
use echo instead of EDITOR in tests
switch swapn to fork/exec
update open command description
fix open command typo
fix open command typo
fix editor variable name
fix exec args
fix exec params for ruby 1.8.7
fix exec params for ruby 1.8.7
Merge pull request #804 from quozd/open-command

Add `gem open` subcommand