Where should I look when my .vimrc is overridden

Question

I wrote

set tw=0

into my .vimrc file.

But when I verify options with

:set

it's still

textwidth=78

Why ?

Answer 1

Why don't you just grep through your .vim directory for it?

Answer 2

If you have modelines enabled, vim will read the last few lines of the file for vim settings, so check that as well.

Answer 3

You can use :

:verbose set tw?

Which should tell you where it was last setted, for example :

textwidth=80
    Last set from ~/.vimrc