bug#25612: 26.0.50; Slightly suboptimal message for disabled commands

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sun, 12 Feb 2017 15:12:31 +0000
> Cc: 25612-done@debbugs.gnu.org
> 
>  No further comments, so I pushed my kludgey solution, and I'm marking
>  this bug done.
> 
> Sorry for not responding earlier, the fix works fine. My only nitpick would 
> be to add a comment for the magic
> number 248 in the code. I can guess it's 0x80 | 'x', but that might not be 
> obvious to casual readers. 

Thanks, I added a comment there.