Trailing whitespace always makes noises in version control system, it is meaningless. We should remove trailing whitespace to avoid annoying other team members.

I can't remember how many times the trailing whitespace makes noises in my git commits, like

如何让 Sublime 自动去除行末的空格？

in Sublime Editor, change in setting:

"trim_trailing_white_space_on_save": true

Sublime Text will remove trailing whitespace on save.

Reference

http://rails-bestpractices.com/posts/60-remove-trailing-whitespace