[bug #65469] [man] poor choice of escape character in `an*scan-string-for-backslash`

[G. Branden Robinson]

Update of bug #65469 (group groff):

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

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Follow-up Comment #1:


commit 63d3e6e0e1ea25b94d23cde3188ff0f1be18c0bf
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Sat Mar 16 20:35:24 2024 -0500

    [man]: Fix Savannah #65469.
    
    Given a second chance, try to avoid Walter Donovan's fate.
    
    * tmac/an.tmac (an*scan-string-for-backslash): Choose an escape
      character that is much less likely than the at sign to be specified in
      a man(7) document's page footer.
    
    Fixes <https://savannah.gnu.org/bugs/?65469>.  Thanks to Thomas Dickey
    for the report.

commit 6ffa91c24fa37ceaec2c9ae4ee14a7d515907342
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Sat Mar 16 20:31:58 2024 -0500

    [tmac]: Regression-test Savannah #65469.
    
    * tmac/tests/an_inner-footer-abbreviation-works.sh: Add regression test
      case for Savannah #65469.
    
    Test fails at this commit.




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