On 24/10/2023 17:40, Ihor Radchenko wrote:
> Max Nikulin writes:
>>>>          [Org mode] (<http://orgmode.org>)
>>>> man
>>>>          man (http://man.he.net/?topic=man&section=all)
[...]
> Should be [man] (<http://man.he.net/?topic=man&section=all>)

Side note: it should be either just "man(1)" or "man(8)" without any URL 
for plain text export, but it is another story.

>>>> internal
>>>>          heading (See section 1)
[...]
> Hmm.. I do see a problem now. To be consistent, it should be
> 
> [heading] (See section 1)

See the attached patch.

After:

--- 8< ---
web
       [Org mode] (<http://orgmode.org>)
man
       [man] (<http://man.he.net/?topic=man&section=all>)
internal
       [heading] (See section 1)


1 Heading
═════════
--- >8 ---

Before:

--- 8< ---
web
       [Org mode] (<http://orgmode.org>)
man
       man (http://man.he.net/?topic=man&section=all)
internal
       heading (See section 1)


1 Heading
═════════
--- >8 ---

I would consider

--- 8< ---
web
       Org mode <http://orgmode.org>
man
       man <http://man.he.net/?topic=man&section=all>
internal
       heading (See section 1)


1 Heading
═════════
--- >8 ---

but inconsistency is worse anyway.