Re: Bootstrap deleted DOC-nnn file

[Eli Zaretskii]

> Date: Sat, 11 May 2013 12:49:00 -0400
> From: Richard Stallman <address@hidden>
> 
> Another use of not deleting the old executables and DOC files
> is that I would be able to tell, roughly, when I got the sources
> last.  That might help me track down the mysterious bug
> that converts multibyte characters to unibyte characters as I edit.
> 
> Right now I have no idea how long ago I had previously recompiled,
> whether it was a few weeks ago or a few months ago.

Doesn't "M-x emacs-version RET" tells you that?  It includes the build
date.