Vim tips

Converting TAB to SPACE

:set et
:ret!

or convert all SPACE to TAB

:set et!
:ret! 

Joining lines based on pattern:

global join:

 :g/pattern/j 

single join:

 :/pattern/j 

Some useful things to .vimrc

set cursorline                  " highlight current line
hi cursorline guibg=#333333     " highlight bg color of current line
"hi tab guibg=#000333     " highlight bg color of current line
hi CursorColumn guibg=#333333   " highlight cursor

syntax on