title: How to create a patch file on windows?
body: <p>On windows, I have two source files and want to create a patch with difference, like <a href="http://www.mail-archive.com/vim_dev@googlegroups.com/msg07550.html" rel="noreferrer">this one</a>.
  But I'm unsure, what format this patch is and what app to use in order to create it? GNU diff output is very different from the patch I can see in the link above.</p>