[bug #60673] adjustment algorithm should disregard nonadjusted lines in its alternation pattern

[G. Branden Robinson]

Update of bug #60673 (project groff):

                  Status:                    None => In Progress            
             Assigned to:                    None => gbranden               

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Follow-up Comment #6:

Confirmed; my change to fix bug #60189 also addresses this issue as a
collateral benefit.


--- 60673-groff-1.22.4  2021-09-04 23:38:39.425040471 +1000
+++ 60673-groff-branden-HEAD    2021-09-04 23:37:42.812757531 +1000
@@ -1,14 +1,14 @@
 While  the  example  in  bug  57836’s original report is somewhat
 contrived and a bit of an edge case in real life, there turns out
-to  be  a  more  innate  bug  in grotty’s balancing algorithm. As
+to be a more innate  bug  in  grotty’s  balancing  algorithm.  As
 mentioned before (and easily observable), when grotty adds spaces
 to  a  line  in  the  process  of justifying it, the algorithm it
 utilizes adds spaces from opposite ends of each line. But when it
-adds  this  space,  it  does  not take into account lines with no
+adds this space, it does not take  into  account  lines  with  no
 adjustment at all required. Therefore if space only need be added
 to  every  other  line  of  the text, all the space ends up being
 added to the same end of the line, degrading the uniform grayness
-of  the  output,  as  can  be  seen in this example. There is one
+of the output, as can be seen  in  this  example.  There  is  one
 fairly simple way to address this: grotty shouldn’t "count" lines
 that  don’t  need  to  be  adjusted; instead, it should apply the
 alternation pattern only to those lines that do need adjustment.


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