Re: Recentish C-s M-y change

[Gregory Heytings]

> > > > In isearch-mode-map at least, the number of changes on control keys 
> > > > during the last twenty years or so is very small: C-u (to allow 
> > > > arguments to subcommands), C-h (to enable help on the 
> > > > isearch-mode-map keys) and C-x (to allow C-x 8 RET).
> > >
> > > Recent discussion shows there has been at least one more -- C-y. And I 
> > > recall C-w.  And C-e, I think.
> >
> > No, as I wrote a few lines above in the message you are replying to, 
> > C-y and C-w are bound in isearch-mode-map since at least 1992.
>
> I think Richards point was that there had been such changes, if they 
> where made in 1992 or some other year isn't really significant. Rather, 
> that they still trip him over.

Yes, and my question is: to which point of time is he referring?  I looked 
further back in time again, and in Emacs 16.56 (1985!), the isearch.el 
file already has (in the comments and in the code):

"^G means the user tried to quit"
"^S means search again, forward, for the same string"
"^R is similar but it searches backward"
"^W means gobble next word from buffer"
"^Y means gobble rest of line from buffer"

And ^Q was already bound to isearch-quote-char.

At that point of time IIUC isearch was terminated by either ESC or a 
random control char.

Apparently (but I could not find a precise point of time) RET started to 
mean exit search near the end of the development of Emacs 18, around 1990.