[vim] NERD Commenter

Edit ~/.vimrc or ~/.vim/vimrc

" set leader to ,
let mapleader=","
let g:mapleader=","

Usage

[count]\cc |NERDComComment|
Comment out the current line or text selected in visual mode. 

,cc  = Comment out the current line or text selected in visual mode. 

[count]\cu |NERDComUncommentLine|
Uncomments the selected line(s). 

,cu = Uncomments the selected line(s). 

Reference:

• The NERD Commenter