Gemfile syntax error:
/var/www/vhosts/system/gitlab/Gemfile:14: syntax error, unexpected ':', expecting $end
gem "mysql2", group: :mysql
                    ^
----- Gemfile ----
# cat Gemfile|head -n20
source "http://rubygems.org"

def darwin_only(require_as)
  RUBY_PLATFORM.include?('darwin') && require_as
end

def linux_only(require_as)
  RUBY_PLATFORM.include?('linux') && require_as
end

gem "rails", "3.2.9"

# Supported DBs
gem "mysql2", group: :mysql
gem "pg", group: :postgres

# Auth
gem "devise", "~> 2.1.0"
gem 'omniauth', "~> 1.1.1"
gem 'omniauth-google-oauth2'