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-rw-r--r--man.794
1 files changed, 49 insertions, 45 deletions
diff --git a/man.7 b/man.7
index 77e90687..81b1effc 100644
--- a/man.7
+++ b/man.7
@@ -458,14 +458,14 @@ The syntax is as follows:
.It Sx \&I Ta n Ta next-line Ta \&
.It Sx \&IB Ta n Ta current Ta \&
.It Sx \&IR Ta n Ta current Ta \&
-.It Sx \&PD Ta n Ta current Ta compat
+.\" .It Sx \&PD Ta n Ta current Ta compat
.It Sx \&R Ta n Ta next-line Ta \&
.It Sx \&RB Ta n Ta current Ta \&
.It Sx \&RI Ta n Ta current Ta \&
.It Sx \&SB Ta n Ta next-line Ta \&
.It Sx \&SM Ta n Ta next-line Ta \&
.It Sx \&TH Ta >1, <6 Ta current Ta \&
-.It Sx \&UC Ta n Ta current Ta compat
+.\" .It Sx \&UC Ta n Ta current Ta compat
.It Sx \&br Ta 0 Ta current Ta compat
.It Sx \&fi Ta 0 Ta current Ta compat
.It Sx \&i Ta n Ta current Ta compat
@@ -473,9 +473,9 @@ The syntax is as follows:
.It Sx \&nf Ta 0 Ta current Ta compat
.It Sx \&r Ta 0 Ta current Ta compat
.It Sx \&sp Ta 1 Ta current Ta compat
-.It Sx \&Sp Ta 0 Ta current Ta compat
-.It Sx \&Vb Ta <1 Ta current Ta compat
-.It Sx \&Ve Ta 0 Ta current Ta compat
+.\" .It Sx \&Sp Ta 0 Ta current Ta compat
+.\" .It Sx \&Vb Ta <1 Ta current Ta compat
+.\" .It Sx \&Ve Ta 0 Ta current Ta compat
.El
.
.Pp
@@ -483,7 +483,9 @@ Macros marked as
.Qq compat
are included for compatibility with the significant corpus of existing
manuals that mix dialects of roff. These macros should not be used for
-portable manuals.
+portable
+.Nm
+manuals.
.
.
.Ss Block Macros
@@ -519,6 +521,11 @@ or
No closure refers to an explicit block closing macro.
.
.Pp
+As a rule, block macros may not be nested; thus, calling a block macro
+while another block macro scope is open, and the open scope is not
+implicitly closed, is syntactically incorrect.
+.
+.Pp
.Bl -column -compact -offset indent "MacroX" "ArgumentsX" "Head ScopeX" "sub-sectionX" "compatX"
.It Em Macro Ta Em Arguments Ta Em Head Scope Ta Em Body Scope Ta Em Notes
.It Sx \&HP Ta <2 Ta current Ta paragraph Ta \&
@@ -896,14 +903,14 @@ See also
.Sx \&P ,
and
.Sx \&PP .
-.
-.
-.Ss \&PD
-Has no effect. Included for compatibility.
-.
-.
-.Ss \&UC
-Has no effect. Included for compatibility.
+.\" .
+.\" .
+.\" .Ss \&PD
+.\" Has no effect. Included for compatibility.
+.\" .
+.\" .
+.\" .Ss \&UC
+.\" Has no effect. Included for compatibility.
.
.
.Ss \&br
@@ -971,46 +978,43 @@ macro. Defaults to 1, if unspecified.
See also
.Sx \&br .
.
-.Ss \&Sp
-A synonym for
-.Sx \&sp
-.Cm 0.5v .
-.
-.Ss \&Vb
-A synonym for
-.Sx \&nf .
-Accepts an argument (the height of the formatted space) which is
-disregarded.
-.
-.Ss \&Ve
-A synonym for
-.Sx \&fi .
-.
+.\" .Ss \&Sp
+.\" A synonym for
+.\" .Sx \&sp
+.\" .Cm 0.5v .
+.\" .
+.\" .Ss \&Vb
+.\" A synonym for
+.\" .Sx \&nf .
+.\" Accepts an argument (the height of the formatted space) which is
+.\" disregarded.
+.\" .
+.\" .Ss \&Ve
+.\" A synonym for
+.\" .Sx \&fi .
+.\" .
.
.Sh COMPATIBILITY
-This section documents compatibility with other roff implementations, at
-this time limited to
-.Xr groff 1 .
+This section documents areas of questionable portability between
+implementations of the
+.Nm
+language.
.Pp
.Bl -dash -compact
.It
-The
-.Xr groff 1
-.Sx \&i
-macro will italicise all subsequent text if a line argument is not
-provided. This behaviour is not implemented.
+In quoted literals, GNU troff allowed pair-wise double-quotes to produce
+a standalone double-quote in formatted output. It is not known whether
+this behaviour is exhibited by other formatters.
.It
-In quoted literals, groff allowed pair-wise double-quotes to produce a
-standalone double-quote in formatted output. This idiosyncratic
-behaviour is no longer applicable.
+Blocks of whitespace are stripped from macro and free-form text lines
+(except when in literal mode) in mandoc. This is not the case for GNU
+troff: for maximum portability, whitespace sensitive blocks should be
+enclosed in literal contexts.
.It
The
.Sx \&sp
-macro does not accept negative numbers.
-.It
-Blocks of whitespace are stripped from both macro and free-form text
-lines (except when in literal mode), while groff would retain whitespace
-in free-form text lines.
+macro does not accept negative values in mandoc. In GNU troff, this
+would result in strange behaviour.
.El
.
.