[groff] 30/36: groff_mm(7): Fix content, style, and markup nits.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 83c95c286632a367cc583a886256e7e7a37e3584
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Mon Jan 16 18:00:26 2023 -0600

    groff_mm(7): Fix content, style, and markup nits.
    
    Content:
    * Refer specifically to DWB mm when discussing "other implementations".
      (Heirloom Doctools mm follows groff.)
    
    Style:
    * Recast discussion of heading type size management.
    * Tighten wording.
    
    Markup:
    * Use two empty requests where vertical space is expected.
---
 contrib/mm/groff_mm.7.man | 38 ++++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/contrib/mm/groff_mm.7.man b/contrib/mm/groff_mm.7.man
index b3a057710..25bc2a59b 100644
--- a/contrib/mm/groff_mm.7.man
+++ b/contrib/mm/groff_mm.7.man
@@ -1651,6 +1651,7 @@ Indentation of the text after the heading is controlled 
by register
 .
 Default value is\~0.
 .
+.
 .IP
 .TS
 tab(@);
@@ -1659,8 +1660,8 @@ L Lx.
 Hi value@Effect
 0@The text is left-justified.
 1@T{
-Indentation of the text follows the value of register
-.B Pt ,
+The text is indented by the value of register
+.BR Pt ;
 see
 .BR P .
 T}
@@ -1670,6 +1671,7 @@ T}
 .TE
 .RE
 .
+.
 .IP
 .B Centered section headings
 .
@@ -1706,49 +1708,57 @@ Default value is
 .
 This could also be written as
 .
+.
 .RS
 .IP
 .B I I I I I I I I I I I I I I
 .RE
 .
+.
 .IP
-Note that some other implementations use
+DWB
+.I mm
+used
 .B 3\~3\~2\~2\~2\~2\~2
-as the default value.
+as the default.
 .
 All omitted values are presumed to have value\~1.
 .RE
 .
+.
 .IP
-.B Point size control
+.B Heading type size
 .
 .RS
-.IP
-String
+The string
 .B HP
-controls the point size of each heading,
-in the same way as
+controls assigns a type size to each heading level,
+analogously to the way
 .B HF
-controls the font.
+selects a font.
 .
-A value of\~0 selects the default point size.
+A value of\~0 uses the default type size.
+.
+The default value is
 .
-Default value is
 .
 .RS
 .IP
 .B 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 .RE
 .
+.
 .IP
-Beware that only the point size changes, not the vertical size.
+Only the type size is changed,
+not the vertical spacing.
 .
-The latter can be controlled by the user-specified macros
+Control the latter with the user-definable macros
 .B HX
 and/or
 .BR HZ .
 .RE
 .
+.
 .IP
 .B Heading counters
 .