bug#50152: Weird characters (eg: â\200\220) are displayed when browsing man pages in Emacs

[Eli Zaretskii <eliz@gnu.org>]

> From: Jehu Amanna <jehuamanna@gmail.com>
> Date: Sat, 21 Aug 2021 17:37:24 +0530
> 
> Vist the man page in this following order : C-x RET c utf-8 RET M-x man RET memset RET
> 
> The following is the output:
> 
> MEMSET(3)                  Linux Programmer's Manual                 MEMSET(3)
> 
> NAME
>        memset - fill memory with a constant byte
> 
> SYNOPSIS
>        #include <string.h>
> 
>        void *memset(void *s, int c, size_t n);
> 
> DESCRIPTION
>        The  memset()  function  fills  the  first  n  bytes of the memory area
>        pointed to by s with the constant byte c.
> 
> RETURN VALUE
>        The memset() function returns a pointer to the memory area s.
> 
> ATTRIBUTES
>        For an  explanation  of  the  terms  used  in  this  section,  see  atâ€â€ 
>        tributes(7).

It's very strange, because I cannot reproduce the problem on my
system, with UTF-8 encoded man pages, although my system's
locale-coding-system is also iso-latin-1.  When I override the default
encoding with "C-x RET c", the man pages are displayed correctly.

From the screenshot you sent, I see that it was taken not in "emacs -Q",
but on Reddit you said that "emacs -Q" shows the same problem?