What are these characters at the end of lines (mc editor)?

Question

Midnight Commander

What are these characters at the end of lines (mc editor) and how to remove them?

Answer 1

This is the end of the line in DOS/Windows encoding - where, as you know, the end of the line is beaten off by two characters.
Put away:
# tr -d "\r" < source.txt > targe.txt

Answer 2

First link on google