bug#27079: 24.4; clipboard paste introduces whitespace in Fundamental (not in Lisp Interaction)

[Eli Zaretskii]

> From: James Powell <powellj@pdx.edu>
> Date: Thu, 25 May 2017 23:34:43 -0700
> 
> 1. cat useful-repro-clipboard-fail-2017-05-25.txt (attached) in a 
> gnome-terminal window.
> 2. select lines from it, e.g.
>    :  16809:            record(locid="1066", value=0)
>    :  18892:            record(locid="1067", value=0)
>    :  21094:            record(locid="1071", value=0)
> 3. In the same window (or another new one, doesn't matter) run "emacs -Q -nw".
> 4. right click to paste.  Observe the few lines you selected appear in the 
> *scratch* buffer,
>        faithfully reproduced.
> 5. C-x b asdf <enter>
> 6. right click to paste.  Observe the introduction of unwanted whitespace,
>        as in
>    :   16809:            record(locid="1066", value=0)
>    :    18892:            record(locid="1067", value=0)
>    :            21094:            record(locid="1071", value=0)
> * What I expect to happen
> In step six of the test, the numbers should all be in a neat column.

This is a feature.  If you don't like it, turn off
electric-indent-mode.  The underlying problem is that Emacs is unable
to distinguish between paste into a text-mode frame and the user
typing the same text from the keyboard.

Emacs 25.1 and later should be able to handle paste into text-mode
Emacs frames more intelligently, if the terminal supports some
advanced feature (so-called "bracketed-paste mode").