[groff] 16/50: groff_mm(7): Note long-undocumented `LB` behavior.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit ec3ad5dcf776182bc238a8cc3b7eb2f1193fc91e
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sun Jun 30 16:21:06 2024 -0500

    groff_mm(7): Note long-undocumented `LB` behavior.
    
    * contrib/mm/groff_mm.7.man (Macros) <LB>: Document behavior when fourth
      argument ("type") is -1.  The groff mm `BVL` macro relies on it.
---
 contrib/mm/ChangeLog      | 5 +++++
 contrib/mm/groff_mm.7.man | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/contrib/mm/ChangeLog b/contrib/mm/ChangeLog
index d87e3a776..bc695f8f3 100644
--- a/contrib/mm/ChangeLog
+++ b/contrib/mm/ChangeLog
@@ -1,3 +1,8 @@
+2024-06-30  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * groff_mm.7.man (Macros) <LB>: Document behavior when fourth
+       argument ("type") is -1.  The groff mm `BVL` macro relies on it.
+
 2024-06-30  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        * m.tmac (BVL): Make first argument optional.  If omitted, use
diff --git a/contrib/mm/groff_mm.7.man b/contrib/mm/groff_mm.7.man
index 19206c7a0..3073a49ba 100644
--- a/contrib/mm/groff_mm.7.man
+++ b/contrib/mm/groff_mm.7.man
@@ -2452,6 +2452,13 @@ items are automatically numbered and
 .I mark
 is interpreted as a register format.
 .
+A
+.I type
+of\~\-1 breaks the line after the mark
+even if it fits within
+.I text-indent;
+this is a GNU extension.
+.
 The default
 .I type
 .RB is\~ 0 .