bug#23574: 24.5; Overzealous underlining in emacs-nox

[Eli Zaretskii]

> From: Colin Woodbury <cwoodbury@azavea.com>
> Date: Mon, 6 Jun 2016 11:25:34 -0700
> Cc: Eli Zaretskii <eliz@gnu.org>, Noam Postavsky 
> <npostavs@users.sourceforge.net>, 23574@debbugs.gnu.org, 
>       John Mastro <john.b.mastro@gmail.com>
> 
> If your statement that uses an implicit happens to span multiple lines, 
> ensime (I believe) just finds the starting
> and ending points of the statement and applies the face to the entire area. 
> In the GUI, this happens to produce
> the desired effect of only underlining where characters are (with the newline 
> as well, as mentioned
> previously).

Once again, there _is_ no newline.  It is not displayed.  What you see
is an empty character cell produced for displaying the cursor.  It has
no direct relation to the newline.

And I don't think what you get is the desired effect, you just get a
side effect of a particular implementation detail.  E.g., what happens
if a line fits exactly on a line, i.e. the cursor at its end will be
displayed on the fringe?

> In TTY this places the face over everything, which we don't agree is a bug or 
> not.

It isn't a bug, because that's how the display engine was coded to
work.  Of course, we can make it behave differently if we want.