[bug #65902] [grog] does not recognize chem preprocessor

[G. Branden Robinson]

Update of bug #65902 (group groff):

                  Status:             In Progress => Fixed                  
             Open/Closed:                    Open => Closed                 
         Planned Release:                    None => 1.24.0                 

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Follow-up Comment #3:


commit 8c4788c44d277814e744a1bacfcc4b10a8b4907b
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Thu Jun 20 18:56:35 2024 -0500

    [grog]: Fix Savannah #65902 (detect use of chem(1)).
    
    * src/utils/grog/grog.pl: Take `cstart` and `cend` tokens out of
      `preprocessor_for_macro` hash.  They don't work with the existing
      logic.  Also drop tokens used by preprocessors that don't have
      corresponding groff(1) options and therefore don't influence the
      output grog(1) can emit.
    
      (do_line): Add bespoke handling for `cstart` and `cend`.  Not only are
      they the only AT&T troff preprocessor tokens that are longer than two
      characters, but their names collide in those first two characters with
      the names of troff requests.
    
    Fixes Savannah #65902.  Thanks to Morten Bo Johansen for the report.
    Problem introduced by me in commit 53a9964497, 31 July 2021.
    
    ANNOUNCE: Acknowledge Morten.

commit 3a06689e7b78a7ba4a4c50881310e87078a30303
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Thu Jun 20 14:10:24 2024 -0500

    [grog]: Regression-test Savannah #65902.
    
    * src/utils/grog/tests/detect-chem.sh: Do it.
    * src/utils/grog/grog.am (grog_TESTS): Run test.
    
    Test fails at this commit.




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