7-2 上传专案到 Heroku
碰到的问题：加'pg'这个gem 然后保存
在终端机输入运行bundle install
提示：
qianchendeiMac:first_app qianchen$ bundle install
[!] There was an error parsing `Gemfile`: syntax error, unexpected end-of-input, expecting end. Bundler cannot continue.
# from /Users/qianchen/first_app/Gemfile:56
# -------------------------------------------
# # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
> gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
# -------------------------------------------
解决方法：发现加'pg'这个gem的时候没有认真比对老师写的代码，漏掉了后面的end.
加上后解决
