[bug #60233] doc/groff.texi: ambiguity in .tkf documentation

[G. Branden Robinson]

Update of bug #60233 (project groff):

                  Status:                    None => Need Info              

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Follow-up Comment #1:

Here is what I think is the relevant code from src/roff/troff/node.cpp.


hunits track_kerning_function::compute(int size)
{  
  if (non_zero) {
    if (max_size <= min_size)
      return min_amount; 
    else if (size <= min_size)                                
      return min_amount;                        
    else if (size >= max_size)
      return max_amount;   
    else                                                               
      return (scale(max_amount, size - min_size, max_size - min_size)   
              + scale(min_amount, max_size - size, max_size - min_size));
  }                                                                     
  else                                                           
    return H0;                      
}


It's very strange to me that track kerning functions get their own class, when
there's only one implementation.  Either someone had big plans that never came
to fruition, or I'm overlooking something.

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