A super-simple vim plugin that:

• Adds an autocmd that trims trailing whitespace on buffer write while preserving cursor position.
• Optionally disables the autocmd for specified blacklisted filetypes (see configuration).

Use Vundle and add the following to your .vimrc:

Bundle 'derekprior/vim-trimmer'

Run the :BundleInstall command and you're off.

To opt certain filetypes out of the autocommand, add them to the blacklist array like so: let g:trimmer_blacklist = ['markdown', 'make'].