How to clear trailing spaces using VIM

:%s=\s\+$==

And thats it!

  • The % tells it to be global - not just the current line.
  • s is a shortcut for substitute.
  • The \s (whitespace) and \+ (at least once) are regular expression terms (the + needs to be escaped, it seems…).
  • The $ (dollar) represents the end of a line.
  • The = are being used as delimiters, the == at the end implies that the pattern is replaced with nothing.

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