vim: multiple whitespaces

.vimrc

@@ -238,6 +238,10 @@ autocmd BufWritePre * :%s/\s\+$//e
 if executable('cat')
   autocmd BufWritePre *.md  %!cat -s
 endif
+" remove multiple whitespaces between words
+" https://stackoverflow.com/questions/5150870/efficient-way-to-remove-multiple-spaces-between-two-words-in-Vim
+autocmd BufWritePre *.md :%s/\(\w\)\s\+\(\w\)/\1 \2/g
+
 
 " Exit Vim if NERDTree is the only window remaining in the only tab.
 autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif