GitHub - airblade/vim-gitgutter: A Vim plugin which shows git diff markers in the sign column and stages/previews/undoes hunks and partial hunks.A Vim plugin which shows a git diff in the sign column. It shows which lines have been added, modified, or removed. You can also preview, stage, and undo individual hunks; and stage partial hunks. The plugin also provides a hunk text object. The signs are always up to date and the plugin never saves your buffer. The name "gitgutter" comes from the Sublime Text 3 plugin which inspired this in 2013.
