[bug #66251] different behaviour of options '-man' and '-mandoc' regarding register 'IN'

[G. Branden Robinson]

Update of bug #66251 (group groff):

                  Status:                    None => Fixed                  
             Assigned to:                    None => gbranden               
             Open/Closed:                    Open => Closed                 
         Planned Release:                    None => 1.24.0                 

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Follow-up Comment #1:

This was fixed a year ago.

The `IN` register no longer has meaning in the _mdoc_ macro package.  Further,
the package lacks (and has always lacked) macros for relative insets of
material, so there is no reason for `IN` to be meaningful in the first place.


commit 5d2e49f8182afc9bf210b7f6dd18e465319fef7b
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Wed Aug 9 19:41:31 2023 -0500

    [man,mdoc]: Make base paragraph indent 5n (1/2).
    
    Change base paragraph indentation to 5n.  This corresponds to the amount
    used by historical man(7) and mdoc(7) implementations going back to Unix
    Version 7 and 4.3BSD-Reno, respectively.
    
    * tmac/an.tmac: Introduce new interface register, `BP`, to control the
      base paragraph indentation amount.  Formerly, `IN` determined it _and_
      the default relative inset amount.
    
      (an-reset-margin-and-inset-level, SH, SS): Use it.
    
    * tmac/doc.tmac: Introduce `BP` register, replacing `IN`.
    * tmac/mdoc/doc-common (Sh): Use it.
    
    * src/preproc/tbl/tests/save-and-restore-tab-stops.sh:
    * tmac/tests/an-ext_SY-and-YS-work.sh:
    * tmac/tests/an_TH-repairs-hy-damage.sh:
    * tmac/tests/an_UE-breaks-before-long-URIs.sh:
    * tmac/tests/an_adjust-link-text-correctly.sh:
    * tmac/tests/an_link-macros-work-in-paragraph-tags.sh:
    * tmac/tests/an_use-input-traps-correctly.sh:
    * tmac/tests/andoc_flush-between-packages.sh:
    * tmac/tests/doc_Mt-works.sh:
    * tmac/tests/doc_indents-correctly.sh:
    * tmac/tests/doc_synopsis_is_not_adjusted.sh: Update amount of
      indentation expected in output.
    
    Fixes <https://savannah.gnu.org/bugs/?64018>.  Thanks to Thorsten Glaser
    and Ingo Schwarze for the discussion.
    
    ANNOUNCE: Credit Ingo and Thorsten.




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