Subject: Re: bug#34286: M-x man grep weird lines

From: Eli Zaretskii <[email-masked]>
Date: Sat, 02 Feb 2019 16:45:08 +0200

tags 34286 notabug
thanks

> From: 積丹尼 Dan Jacobson
> 	<[email-masked]>
> Date: Fri, 01 Feb 2019 07:17:17 +0800
> 
> $ emacs -nw -q
> M-x man grep
> 
> Do you see those weird lines?

That's normal: faces straddle the newline.  In this case, it's the
underline face, but you will see the same if you use a face with a
non-default background color.