在部署到heroku时，twitter bootstrap的application.css中的CSS错误，但我的application.css文件是裸的！我怎样才能找到错误

Question

我正在尝试调整我正在部署的应用程序的CSS但是当我运行rake资产时：预编译我收到此消息（与示例相同，即使使用--trace）：

C:\Sites\LaunchPage>rake assets:precompile --trace
** Invoke assets:precompile (first_time)
** Execute assets:precompile
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
mkdir -p C:/Sites/LaunchPage/public/assets
rake aborted!
Invalid CSS after "  margin:": expected pseudoclass or pseudoelement, was " 0;"
(in C:/Sites/LaunchPage/app/assets/stylesheets/application.css)
(sass):457
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)