--user-install warning even when commented

[Steve Hay]

The rbenv-doctor utility gives a warning even if the --user-install line in /etc/gemrc is commented out.

Please remove --user-install' flag from /etc/gemrc'.

This is the gemrc file:

# Read about the gemrc format at http://guides.rubygems.org/command-reference/#gem-environment

# --user-install is used to install to $HOME/.gem/ by default since we want to separate
#                pacman installed gems and gem installed gems
#gem: --user-install

[Steve Hay]

Maybe this is a fix:

Line 144

if grep -q -e --user-install "$gemrc" 2>/dev/null; then

to

if grep -o -e '^[^#]*' /etc/gemrc | grep  -e --user-install 2>/dev/null; then