vim Whitespace Convert tabs to spaces and spaces to tabs
Example
You can convert tabs to spaces by doing the following:
First check that expandtab is switched off
:set noexpandtab
Then
:retab!
which replaces spaces of a certain length with tabs
If you enable expandtab again :set expandtab then and run the :retab! command then all the tabs becomes spaces.
If you want to do this for selected text then first select the text in visual mode.
