Useful :TrimWhitespace command to trim trailing spaces and such

.vimrc

@@ -410,6 +410,8 @@ let g:preview_markdown_vertical = 1
 " Navigate through and from markdown files
 "Plug 'chmp/mdnav'
 Plug 'aquatix/mdnav', { 'branch': 'fixes' }
+" Only open these local files in vim, use pyfile for all others:
+let g:mdnav#Extensions = 'md, MD, markdown, todo, txt, rst'
 
 
 " The NERD Commenter: A plugin that allows for easy commenting of code for
@@ -496,6 +498,14 @@ set listchars=tab:▸\ ,trail:·
 " Display whitespace
 set list
 
+" Trim trailing whitespace with :TrimWhitespace
+fun! TrimWhitespace()
+    let l:save = winsaveview()
+    keeppatterns %s/\s\+$//e
+    call winrestview(l:save)
+endfun
+command! TrimWhitespace call TrimWhitespace()
+
 " enable words completion
 set dictionary+=/usr/share/dict/words
 " use ctrl-n ctrl-n instead of ctrl-x ctrl-k