[bug #64440] [docs] minor corrections and updates

[G. Branden Robinson]

Follow-up Comment #10, bug #64440 (project groff):

Thanks, Dave.

That was an accident.  I'll restore the entry in my next push.


commit 71c28da6a0b8e2085fe5a5aa9d898d6df8f8dbf2
Author:     G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Tue Jul 25 07:13:01 2023 -0500
Commit:     G. Branden Robinson <g.branden.robinson@gmail.com>
CommitDate: Tue Jul 25 07:13:01 2023 -0500

    ChangeLog: Restore missing entry.
    
    It got erroneously dropped in a rebase.

diff --git a/ChangeLog b/ChangeLog
index c496ddb88..a184500e1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -53,6 +53,25 @@
        Fixes <https://savannah.gnu.org/bugs/?64440>.  Thanks to Dave
        Kemper for the report and review.
 
+2023-07-25  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * src/roff/troff/env.cpp (environment::print_env): Fix error in
+       report.  The units of {minimum inter-word, additional
+       inter-sentence} space size are 12ths of the font's "spacewidth"
+       parameter, not 36ths of an em.
+
+       Consider the following input.
+         .\" groff -T ps -Z
+         .nf
+         foo bar1
+         .ss 12
+         foo bar2 \" cases 1 and 2 are the same
+         foo\h'1m/3u'bar3 \" wider than 1 & 2
+         foo\h'1m/36u*12u'bar4 \" slightly narrower than case 3
+         .ss 11
+         foo bar5 \" narrower than case 1 (as expected)
+         foo\h'1m/36u*11u'bar6 \" between cases (1,2) and 4
+
 2023-07-19  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        * tmac/papersize.tmac: If not already defined, set `PO` register





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