39587 active golfers, 470522 entries, 603 challenges
Open VimGolf challenges
Whitespace, empty lines and tabs - 3614 entries
Convert tabs to spaces, strip empty lines and trailing whitespace.
Simple text editing with Vim - 12744 entries
Make the pairs of lines match up by making each second line same as first
Reformat/Refactor a Golfer Class - 6942 entries
A simple case of removing unneeded code and fixing broken indentation.