bug#69555: 30.0.50; shr - Preserve indentation when shr-fill-text is nil

[Eli Zaretskii]

> From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
> Cc: 69555@debbugs.gnu.org,  Eli Zaretskii <eliz@gnu.org>
> Date: Wed, 13 Mar 2024 22:41:32 +0100
> 
> Eli, am I clear to push & close?

Yes, but please fix the following nits before installing:

  . use only ASCII characters in the commit log message
  . make sure lines in the commit log message do not exceed 65 columns

Thanks.