mdocml: "Tweak previous": "badly nested" becomes badly-nested, some

[kristaps@mdocml.bsd.lv]

Log Message:
-----------
"Tweak previous": "badly nested" becomes badly-nested, some typos
corrected, and a bit of clarity for my own sake.

Modified Files:
--------------
    mdocml:
        mdoc.3

Revision Data
-------------
Index: mdoc.3
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mdoc.3,v
retrieving revision 1.45
retrieving revision 1.46
diff -Lmdoc.3 -Lmdoc.3 -u -p -r1.45 -r1.46
--- mdoc.3
+++ mdoc.3
@@ -257,10 +257,10 @@ an empty line will produce a zero-length
 Multiple body parts are only found in invocations of
 .Sq \&Bl \-column ,
 where a new body introduces a new phrase.
-.Ss Badly nested blocks
-A special kind of node is available to end the formatting
-associated with a given block before the physical end of that block.
-Such an ENDBODY node has a non-null
+.Ss Badly-nested Blocks
+The ENDBODY node is available to end the formatting associated
+with a given block before the physical end of that block.
+It has a non-null
 .Va end
 field, is of the BODY
 .Va type ,
@@ -297,25 +297,32 @@ BLOCK Ao
 TEXT end
 .Ed
 .Pp
-Here, the formatting of the Ao block extends from TEXT ao to TEXT ac,
-while the formatting of the Bo block extends from TEXT bo to TEXT bc,
-rendering like this in
+Here, the formatting of the
+.Sq \&Ao
+block extends from TEXT ao to TEXT ac,
+while the formatting of the
+.Sq \&Bo
+block extends from TEXT bo to TEXT bc.
+It renders as follows in
 .Fl T Ns Cm ascii
 mode:
+.Pp
 .Dl <ao [bo ac> bc] end
-Support for badly nested blocks is only provided for backward
+.Pp
+Support for badly-nested blocks is only provided for backward
 compatibility with some older
 .Xr mdoc 7
 implementations.
-Using them in new code is stronly discouraged:
-Some frontends, in particular
-.Fl T Ns Cm html ,
-are unable to render them in any meaningful way,
-many other
-.Xr mdoc 7
-implementations do not support them, and even for those that do,
-the behaviour is not well-defined, in particular when using multiple
-levels of badly nested blocks.
+Using badly-nested blocks is
+.Em strongly discouraged :
+the
+.Fl T Ns Cm html
+and
+.Fl T Ns Cm xhtml
+front-ends are unable to render them in any meaningful way.
+Furthermore, behaviour when encountering badly-nested blocks is not
+consistent across troff implementations, especially when using  multiple
+levels of badly-nested blocks.
 .Sh EXAMPLES
 The following example reads lines from stdin and parses them, operating
 on the finished parse tree with
--
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