Gemfile syntax error:
/home/enspire/Desktop/webapps/trucker-app/Trucker_app/Gemfile:35: syntax error, unexpected ':', expecting kEND
  gem 'sdoc', require: false
                      ^ (Bundler::GemfileError)
  /usr/lib/ruby/vendor_ruby/bundler/dsl.rb:33:in `eval_gemfile'
  /usr/lib/ruby/vendor_ruby/bundler/dsl.rb:9:in `evaluate'
  /usr/lib/ruby/vendor_ruby/bundler/definition.rb:19:in `build'
  /usr/lib/ruby/vendor_ruby/bundler.rb:148:in `definition'
  /usr/lib/ruby/vendor_ruby/bundler.rb:116:in `setup'
  /usr/lib/ruby/vendor_ruby/bundler/setup.rb:17
  /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
  /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
  /var/lib/gems/1.8/gems/passenger-4.0.46/lib/phusion_passenger/loader_shared_helpers.rb:263:in `run_load_path_setup_code'
  /var/lib/gems/1.8/gems/passenger-4.0.46/lib/phusion_passenger/loader_shared_helpers.rb:366:in `running_bundler'
  /var/lib/gems/1.8/gems/passenger-4.0.46/lib/phusion_passenger/loader_shared_helpers.rb:261:in `run_load_path_setup_code'
  /var/lib/gems/1.8/gems/passenger-4.0.46/helper-scripts/rack-preloader.rb:100:in `preload_app'
  /var/lib/gems/1.8/gems/passenger-4.0.46/helper-scripts/rack-preloader.rb:158