How can you automatically remove trailing whitespace in vim

Question

I am getting \'trailing whitespace\' errors trying to commit some files in git.

I want to remove these trailing whitespace characters automatically right before I sa

Answer 1

The other approaches here somehow didn't work for me in MacVim when used in the .vimrc file. So here's one that does and highlights trailing spaces:

set encoding=utf-8
set listchars=trail:·
set list