Re: What is a "superior mode"?

[Eli Zaretskii]

> From: Marcin Borkowski <mbork@mbork.pl>
> Date: Tue, 09 Mar 2021 05:54:45 +0100
> 
>  -- Function: prog-first-column
>      Call this function instead of using a literal value (usually, zero)
>      of the column number for indenting top-level program constructs.
>      The function’s value is the column number to use for top-level
>      constructs.  When no superior mode is in effect, this function
>      returns zero.
> 
> What is a "superior mode" (and a "sub-mode", for that matter)?

That was supposed to be clear from the paragraph before the
description of prog-indentation-context, which explains the context
where these two come in handy.