.Gemrc

See http://www.justinball.com/2011/07/18/ruby-1-9-2-rvm-and-a-nasty-error-when-installing-rubygems-couldnt-parse-yaml-at-line-2-column-10-psychsyntaxerror/

Old file:

echo -e '---
:benchmark: false
gem: --no-ri --no-rdoc
:update_sources: true
:bulk_threshold: 1000
:verbose: true
:sources:
- http://rubygems.org
- http://gems.github.com
:backtrace: false' > ~/.gemrc