Strip trailing whitespace on changed lines. This plugin was inspired by a question on the Vi StackExchange.
This plugin uses diff to strip whitespace from lines that you
changed while editing. This allows you to keep newly added lines
clean without affecting the history of existing lines.
Whitespace can be automatically stripped when writing the buffer by
setting g:wstrip_auto or b:wstrip_auto to 1. This is disabled
by default.
To enable globally for all filetypes, place let g:wstrip_auto = 1 in
a location that's loaded by Vim on startup (e.g., vimrc).
To enable for a specific filetype, add let b:wstrip_auto = 1 in the
filetype's ftplugin file.
If you don't want automatic cleaning, the :WStrip command can be
used to manually clean whitespace.
Trailing whitespace will be highlighted using the WStripTrailing
syntax group. If it appears that Vim is capable of underlining text,
trailing whitespace will be highlighted as a red underline.
Otherwise, it will highlighted with a red background. To disable
highlighting, set b:wstrip_highlight or g:wstrip_highlight to 0.
If you want to allow a certain amount of trailing whitespace, you can
set b:wstrip_trailing_max to the maximum number of whitespace
characters that are allowed to be at the end of a line. By default,
this is set to 2 for the markdown filetype.
MIT