-T cols (--tabsize=cols)
Set the size (width) of a tab to cols columns.
The value of cols must be greater than 0. The default value is 8.
-E (--tabstospaces)
Convert typed tabs to spaces.
set tabsize n
Use a tab size of n columns. The value of n must be greater than 0.
The default value is 8.
set/unset tabstospaces
Convert typed tabs to spaces.