有无效的间隔/var/lib/gems/1.8/gems/middleman-s3_sync-3.0.21/lib/middleman-s3_sync.rb:2:in require': /var/lib/gems/1.8/gems/middleman-s3_sync-3.0.21/lib/middleman/s3_sync.rb:54: syn
cd ~/Documents/Webcd my_projectgem install middleman-bower
我在-2.2.1/gems/middleman-core-4.1.1/lib/middleman-core/extensions.rb:68:in `register': You must provide/.rvm/gems