Re: tab-width 4 in markdown major mode

[Daniel Martín]

Frank Hrebabetzky <hreba@t-online.de> writes:

>> Are you sure, taking a look at the definition of markdown-mode
>> https://github.com/jrblevin/markdown-mode/blob/master/markdown-mode.el#L9585
>> it seems to explicitly set the tab-width to 4.
>> 
>
> Sorry, you are right. What i tried was C-h tab-width, which tells
> value 4 and original value 8, and contains a link "customize". This
> leads to the customization window with an entry mask, but the actual
> value there is 8. So I don't know how to set the effective value 4 to
> 8.

tab-width is a buffer-local variable, which means that it can have
different values for different buffers.  As markdown-mode sets it with
setq, it sets the buffer-local value to 4, but the default remains as 8.

If you want to set tab-width to 8 everywhere, you could eval:

(setq-default tab-width 8) ;; This will set the *default* value of tab-width

And then, to override the buffer-local value set by markdown-mode:

(add-hook 'markdown-mode-hook (lambda ()
                        (setq tab-width 8)))

Hope this helps.