Single letter insert
From Vim Tips Wiki
created January 30, 2004 · complexity basic · author Astrobe · version 5.7
Often I have to insert only one character (typically a paren).
:map <C-x> ylpr
Doesn't work when there is nothing already on the line. I use
:map ,i i?<Esc>r " and :map ,a a?<Esc>r