ANSI escape code weird behavior at end of line

Filling the line with the currently-selected colors is a detail of bce (back color erase) which could be implemented differently in different terminals—but Linux console and xterm happen to do it this way. It's an FAQ:

• My terminal shows some uncolored spaces (ncurses, see indn)
• That color scheme is odd, say more? (xterm)
• Who did it? (some comments on the origin of this particular design)

This is for everyone who searches a quick answer.From the links of Thomas Dickey's answer I came up with the following workaround.

echo -e "\e[41mTest\nTest2\e[0mTest3\e[K"

The \e[K part paints the rest of the line with the current background color. As it needs to be sent before every newline character for every line that uses colors I have to rewrite my code a bit though...

@Scindix's answer worked great for me, so in order to fix the background colour wrapping, I wrote a tiny script, ./fill-background-colour-to-line-end, that I can pipe another command to:

#!/usr/bin/env ruby# frozen_string_literal: trueSTDIN.each_char do |char|  print "\e[K" if char == "\n"  print charend

Not only does it fix the wrapping weirdness, but filling the background colour to the end of the line was what I'd been wanting anyway =)

Side note: I tried Tilix and LX Terminal; the behaviour there is the same.