Modified gem action str with leading newline

actions.rb

# http://github.com/rails/rails/blob/master/railties/lib/rails/generators/actions.rb#L70-74
# rails/railties/lib/rails/generators/actions.rb

# FROM:
in_root do
  str = "gem #{parts.join(", ")}\n"
  str = "  " + str if @in_group
  append_file "Gemfile", str, :verbose => false
end


# TO:
in_root do
  str = "\ngem #{parts.join(", ")}\n"
  str = "  " + str if @in_group
  append_file "Gemfile", str, :verbose => false
end