mdocml: Discourage the use of esr's man-ext macros: If man(7) has any

mdocml: Discourage the use of esr's man-ext macros: If man(7) has any

[schwarze]

Log Message:
-----------
Discourage the use of esr's man-ext macros:
If man(7) has any advantage compared to mdoc(7), it's portability,
and using man-ext would needlessly give that advantage away.
ok kristaps@

Modified Files:
--------------
    mdocml:
        man.7

Revision Data
-------------
Index: man.7
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/man.7,v
retrieving revision 1.113
retrieving revision 1.114
diff -Lman.7 -Lman.7 -u -p -r1.113 -r1.114
--- man.7
+++ man.7
@@ -272,10 +272,6 @@ in the alphabetical reference below.
 .It Sx RB Ta alternate between roman and boldface fonts
 .It Sx RI Ta alternate between roman and italic fonts
 .El
-.Ss Semantic markup
-.Bl -column "PP, LP, P" description
-.It Sx OP Ta optional arguments
-.El
 .Sh MACRO REFERENCE
 This section is a canonical reference to all macros, arranged
 alphabetically.
@@ -443,7 +439,8 @@ and
 .Sx \&TP .
 .Ss \&OP
 Optional command-line argument.
-This has the following syntax:
+This is a non-standard GNU extension, included only for compatibility.
+It has the following syntax:
 .Bd -filled -offset indent
 .Pf \. Sx \&OP
 .Cm key Op Cm value
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