Some terminal applications, like mutt and weechat, prints a newline at
the end of each line even if text is wrapped. This causes urls which are
wrapped to not be selectable in full.
By ignoring newlines when the text fills the entire width of the screen,
those urls can be selected. Many other terminal emulators do this as
well.
A drawback of this is that if a url happens to fill the width of the
screen, the url selection will include the first word of the next line,
but this doesn't happen that often so I think it's an okay tradeoff.
Fixes#313
Remove tests that asserted that Cursor Down (CUD) and Cursor Up (CUU)
escape sequences were affected by the scrolling region set by DECSTBM.
This was incorrect and recently fixed:
https://github.com/termux/termux-app/issues/1340
