Noted that `Pa' can accept 0 arguments.

[mandoc.git] / mdoc.7

diff --git a/mdoc.7 b/mdoc.7
index 8f5e8551ce2c8e46baa2d4fab4cf889120b2a331..c68912e373390add1059bb29c6ad7e1a741bfda0 100644 (file)
--- a/mdoc.7
+++ b/mdoc.7
@@ -1,4 +1,4 @@
-.\"    $Id: mdoc.7,v 1.44 2009/07/17 12:08:08 kristaps Exp $
+.\"    $Id: mdoc.7,v 1.50 2009/07/20 13:45:11 kristaps Exp $

 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
 .\"
 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
 .\"


@@ -13,8 +13,8 @@
 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

-.\" 
-.Dd $Mdocdate: July 17 2009 $
+.\"
+.Dd $Mdocdate: July 20 2009 $

 .Dt MDOC 7
 .Os
 .\" SECTION---------------------------------------------
 .Dt MDOC 7
 .Os
 .\" SECTION---------------------------------------------


@@ -25,22 +25,22 @@
 .Sh DESCRIPTION
 The
 .Nm mdoc
 .Sh DESCRIPTION
 The
 .Nm mdoc

-language is used to format 
-.Bx 
+language is used to format
+.Bx

 .Ux
 manuals.  In this reference document, we describe its syntax, structure,
 and usage.  Our reference implementation is
 .Xr mandoc 1 .
 The
 .Sx COMPATIBILITY
 .Ux
 manuals.  In this reference document, we describe its syntax, structure,
 and usage.  Our reference implementation is
 .Xr mandoc 1 .
 The
 .Sx COMPATIBILITY

-section describes compatibility with 
+section describes compatibility with

 .Xr groff 1 .
 .\" PARAGRAPH------------
 .Pp
 An
 .Nm
 document follows simple rules:  lines beginning with the control
 .Xr groff 1 .
 .\" PARAGRAPH------------
 .Pp
 An
 .Nm
 document follows simple rules:  lines beginning with the control

-character 
+character

 .Sq \.
 are parsed for macros.  Other lines are interpreted within the scope of
 prior macros:
 .Sq \.
 are parsed for macros.  Other lines are interpreted within the scope of
 prior macros:


@@ -49,13 +49,13 @@ prior macros:
 Other lines are interpreted within the current state.
 .Ed
 .\" SECTION---------------------------------------------
 Other lines are interpreted within the current state.
 .Ed
 .\" SECTION---------------------------------------------

-.Sh INPUT ENCODING
+.Sh LANGUAGE SYNTAX

 .Nm
 documents may contain only graphable 7-bit ASCII characters, the space
 character, and, in certain circumstances, the tab character.  All
 manuals must have
 .Ux
 .Nm
 documents may contain only graphable 7-bit ASCII characters, the space
 character, and, in certain circumstances, the tab character.  All
 manuals must have
 .Ux

-line termination.  
+line terminators.

 .\" SUB-SECTION----------------------
 .Ss Comments
 Text following a
 .\" SUB-SECTION----------------------
 .Ss Comments
 Text following a


@@ -87,9 +87,9 @@ Within a macro line, the following characters are reserved:
 .It \&?
 .Pq question
 .It \&!
 .It \&?
 .Pq question
 .It \&!

-.Pq exclamation 
+.Pq exclamation

 .It \&|
 .It \&|

-.Pq vertical bar 
+.Pq vertical bar

 .El
 .\" PARAGRAPH------------
 .Pp
 .El
 .\" PARAGRAPH------------
 .Pp


@@ -98,13 +98,13 @@ Use of reserved characters is described in
 For general use in macro lines, these characters must either be escaped
 with a non-breaking space
 .Pq Sq \e&
 For general use in macro lines, these characters must either be escaped
 with a non-breaking space
 .Pq Sq \e&

-or, if applicable, an appropriate escape sequence used.  
+or, if applicable, an appropriate escape sequence used.

 .\" SUB-SECTION----------------------
 .Ss Special Characters
 Special characters may occur in both macro and free-form lines.
 Sequences begin with the escape character
 .Sq \e
 .\" SUB-SECTION----------------------
 .Ss Special Characters
 Special characters may occur in both macro and free-form lines.
 Sequences begin with the escape character
 .Sq \e

-followed by either an open-parenthesis 
+followed by either an open-parenthesis

 .Sq \&(
 for two-character sequences; an open-bracket
 .Sq \&[
 .Sq \&(
 for two-character sequences; an open-bracket
 .Sq \&[


@@ -112,10 +112,10 @@ for n-character sequences (terminated at a close-bracket
 .Sq \&] ) ;
 or a single one-character sequence.  See
 .Xr mandoc_char 1
 .Sq \&] ) ;
 or a single one-character sequence.  See
 .Xr mandoc_char 1

-for a complete list.  Examples include 
-.Sq \e(em 
-.Pq em-dash 
-and 
+for a complete list.  Examples include
+.Sq \e(em
+.Pq em-dash
+and

 .Sq \ee
 .Pq back-slash .
 .\" PARAGRAPH------------
 .Sq \ee
 .Pq back-slash .
 .\" PARAGRAPH------------


@@ -133,32 +133,62 @@ escape followed by an indicator: B (bold), I, (italic), or P and R
 (Roman, or reset).  This form is not recommended.
 .\" SUB-SECTION----------------------
 .Ss Whitespace
 (Roman, or reset).  This form is not recommended.
 .\" SUB-SECTION----------------------
 .Ss Whitespace

-In general, consecutive blocks of whitespace are pruned from input.
-These are later re-added, when applicable, by 
-.Xr mandoc 1 .
+In non-literal free-form lines, consecutive blocks of whitespace are
+pruned from input and added later in the output filter, if applicable:
+.Bd -literal -offset indent
+These     spaces   are    pruned       from    input.
+\&.Bd \-literal
+These         are              not.
+\&.Ed
+.Ed
+.\" PARAGRAPH------------
+.Pp
+In macro lines, whitespace delimits arguments and is discarded.  If
+arguments are quoted, whitespace within the quotes is retained.

 .\" PARAGRAPH------------
 .Pp
 .\" PARAGRAPH------------
 .Pp

-Blank lines are permitted within
-.Sq \&Bd \-literal
-or
-.Sq \&Bd \-unfilled
-contexts.  Tab characters are only acceptable when delimiting 
+Blank lines are only permitted within literal contexts, as are lines
+containing only whitespace.  Tab characters are only acceptable when
+delimiting

 .Sq \&Bl \-column
 .Sq \&Bl \-column

-and in
-.Sq \&Bd \-literal
-or
-.Sq \&Bd \-unfilled
-contexts.
+or when in a literal context.
+.\" SUB-SECTION----------------------
+.Ss Quotation
+Macro arguments may be quoted with a double-quote to group
+space-delimited terms or to retain blocks of whitespace.  A quoted
+argument begins with a double-quote preceded by whitespace.  The next
+double-quote not pair-wise adjacent to another double-quote terminates
+the literal, regardless of surrounding whitespace.
+.\" PARAGRAPH------------
+.Pp
+This produces tokens
+.Sq a" ,
+.Sq b c ,
+.Sq de ,
+and
+.Sq fg" .
+Note that any quoted term, be it argument or macro, is indiscriminately
+considered literal text.  Thus, the following produces
+.Sq \&Em a :
+.Bd -literal -offset indent
+\&.Em "Em a"
+.Ed
+.\" PARAGRAPH------------
+.Pp
+In free-form mode, quotes are regarded as opaque text.

 .\" SECTION---------------------------------------------
 .Sh MANUAL STRUCTURE
 Each
 .Nm
 .\" SECTION---------------------------------------------
 .Sh MANUAL STRUCTURE
 Each
 .Nm

-document must begin with a document prologue, containing, in order, 
+document must begin with a document prologue, containing, in order,

 .Sq \&Dd ,
 .Sq \&Dt ,
 and
 .Sq \&Dd ,
 .Sq \&Dt ,
 and

-.Sq \&Os 
-(using this manual as an example):
+.Sq \&Os ,
+then the NAME section containing at least one
+.Sq \&Nm
+followed by
+.Sq \&Nd :

 .Bd -literal -offset indent
 \&.Dd $\&Mdocdate$
 \&.Dt mdoc 7
 .Bd -literal -offset indent
 \&.Dd $\&Mdocdate$
 \&.Dt mdoc 7


@@ -167,25 +197,19 @@ and
 \&.Nm mdoc
 \&.Nd mdoc language reference
 .Ed
 \&.Nm mdoc
 \&.Nd mdoc language reference
 .Ed

-.Pp
-Following these, the document body must begin with the NAME section
-containing at least one 
-.Sq \&Nm
-followed by 
-.Sq \&Nd .

 .\" PARAGRAPH------------
 .Pp
 Subsequent SYNOPSIS and DESCRIPTION sections are strongly encouraged,
 .\" PARAGRAPH------------
 .Pp
 Subsequent SYNOPSIS and DESCRIPTION sections are strongly encouraged,

-but non-compulsory. 
+but non-compulsory.

 .\" SECTION---------------------------------------------
 .Sh MACRO SYNTAX
 .\" SECTION---------------------------------------------
 .Sh MACRO SYNTAX

-Every line beginning with the control character 
+Every line beginning with the control character

 .Sq \.
 .Sq \.

-is processed for macros, two- or three-character semantic annotations.
+is processed for macros, two- or three-character sequences.

 .\" PARAGRAPH------------
 .Pp
 .\" PARAGRAPH------------
 .Pp

-The syntax of macro depends on its classification.  In this section,
-.Sq \-arg 
+The syntax of a macro depends on its classification.  In this section,
+.Sq \-arg

 refers to macro arguments, which may be followed by zero or more
 .Sq parm
 parameters;
 refers to macro arguments, which may be followed by zero or more
 .Sq parm
 parameters;


@@ -198,8 +222,8 @@ closes it out.
 The
 .Em Callable
 column indicates that the macro may be called subsequent to the initial
 The
 .Em Callable
 column indicates that the macro may be called subsequent to the initial

-line-macro.  The 
-.Qq Parsable
+line-macro.  The
+.Em Parsable

 column indicates whether the macro may be followed by further
 (ostensibly callable) macros.  The
 .Em Scope
 column indicates whether the macro may be followed by further
 (ostensibly callable) macros.  The
 .Em Scope


@@ -211,8 +235,8 @@ contains bodies; only
 .Pq Sq \&Bf
 contains a head.
 .Bd -literal -offset indent
 .Pq Sq \&Bf
 contains a head.
 .Bd -literal -offset indent

-\&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB 
-\(lBbody...\(rB 
+\&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB
+\(lBbody...\(rB

 \&.Yc
 .Ed
 .\" PARAGRAPH------------
 \&.Yc
 .Ed
 .\" PARAGRAPH------------


@@ -231,20 +255,20 @@ contains a head.
 .\" SUB-SECTION----------------------
 .Ss Block full-implicit
 Multi-line scope closed by end-of-file or implicitly by another macro.
 .\" SUB-SECTION----------------------
 .Ss Block full-implicit
 Multi-line scope closed by end-of-file or implicitly by another macro.

-All macros have bodies; some 
+All macros have bodies; some

 .Po
 .Po

-.Sq \&It \-bullet , 
-.Sq \-hyphen , 
+.Sq \&It \-bullet ,
+.Sq \-hyphen ,

 .Sq \-dash ,
 .Sq \-enum ,
 .Sq \-dash ,
 .Sq \-enum ,

-.Sq \-item 
+.Sq \-item

 .Pc
 .Pc

-don't have heads, while 
+don't have heads, while

 .Sq \&It \-column
 may have multiple heads.
 .Bd -literal -offset indent
 .Sq \&It \-column
 may have multiple heads.
 .Bd -literal -offset indent

-\&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead... \(lBTa head...\(rB\(rB 
-\(lBbody...\(rB 
+\&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead... \(lBTa head...\(rB\(rB
+\(lBbody...\(rB

 .Ed
 .\" PARAGRAPH------------
 .Pp
 .Ed
 .\" PARAGRAPH------------
 .Pp


@@ -258,17 +282,17 @@ may have multiple heads.
 .\" SUB-SECTION----------------------
 .Ss Block partial-explicit
 Like block full-explicit, but also with single-line scope.  Each
 .\" SUB-SECTION----------------------
 .Ss Block partial-explicit
 Like block full-explicit, but also with single-line scope.  Each

-has at least a body and, in limited circumstances, a head 
+has at least a body and, in limited circumstances, a head

 .Pq So \&Fo Sc , So \&Eo Sc
 .Pq So \&Fo Sc , So \&Eo Sc

-and/or tail 
+and/or tail

 .Pq So \&Ec Sc .
 .Bd -literal -offset indent
 .Pq So \&Ec Sc .
 .Bd -literal -offset indent

-\&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB 
-\(lBbody...\(rB 
-\&.Yc \(lBtail...\(rB 
+\&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB
+\(lBbody...\(rB
+\&.Yc \(lBtail...\(rB

 
 \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB \
 
 \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB \

-\(lBbody...\(rB \&Yc \(lBtail...\(rB 
+\(lBbody...\(rB \&Yc \(lBtail...\(rB

 .Ed
 .\" PARAGRAPH------------
 .Pp
 .Ed
 .\" PARAGRAPH------------
 .Pp


@@ -301,8 +325,8 @@ and/or tail
 .El
 .\" SUB-SECTION----------------------
 .Ss Block partial-implicit
 .El
 .\" SUB-SECTION----------------------
 .Ss Block partial-implicit

-Like block full-implicit, but with single-line scope closed by 
-.Sx Reserved Characters 
+Like block full-implicit, but with single-line scope closed by
+.Sx Reserved Characters

 or end of line.
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBbody...\(rB \(lBres...\(rB
 or end of line.
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBbody...\(rB \(lBres...\(rB


@@ -325,12 +349,12 @@ or end of line.
 .El
 .\" SUB-SECTION----------------------
 .Ss In-line
 .El
 .\" SUB-SECTION----------------------
 .Ss In-line

-Closed by 
+Closed by

 .Sx Reserved Characters ,
 end of line, fixed argument lengths, and/or subsequent macros.  In-line
 macros have only text children.  If a number (or inequality) of
 arguments is
 .Sx Reserved Characters ,
 end of line, fixed argument lengths, and/or subsequent macros.  In-line
 macros have only text children.  If a number (or inequality) of
 arguments is

-.Pq n , 
+.Pq n ,

 then the macro accepts an arbitrary number of arguments.
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBargs...\(rB \(lbres...\(rb
 then the macro accepts an arbitrary number of arguments.
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBargs...\(rB \(lbres...\(rb


@@ -363,7 +387,7 @@ then the macro accepts an arbitrary number of arguments.
 .It \&Bsx    Ta    Yes      Ta    Yes      Ta    n
 .It \&Bt     Ta    \&No     Ta    \&No     Ta    0
 .It \&Bx     Ta    Yes      Ta    Yes      Ta    n
 .It \&Bsx    Ta    Yes      Ta    Yes      Ta    n
 .It \&Bt     Ta    \&No     Ta    \&No     Ta    0
 .It \&Bx     Ta    Yes      Ta    Yes      Ta    n

-.It \&Cd     Ta    Yes      Ta    \&No     Ta    >0
+.It \&Cd     Ta    Yes      Ta    Yes      Ta    >0

 .It \&Cm     Ta    Yes      Ta    Yes      Ta    n
 .It \&Db     Ta    \&No     Ta    \&No     Ta    1
 .It \&Dd     Ta    \&No     Ta    \&No     Ta    >0
 .It \&Cm     Ta    Yes      Ta    Yes      Ta    n
 .It \&Db     Ta    \&No     Ta    \&No     Ta    1
 .It \&Dd     Ta    \&No     Ta    \&No     Ta    >0


@@ -414,25 +438,36 @@ then the macro accepts an arbitrary number of arguments.
 .It \&Vt     Ta    Yes      Ta    Yes      Ta    >0
 .It \&Xr     Ta    Yes      Ta    Yes      Ta    >0, <3
 .It \&br     Ta    \&No     Ta    \&No     Ta    0
 .It \&Vt     Ta    Yes      Ta    Yes      Ta    >0
 .It \&Xr     Ta    Yes      Ta    Yes      Ta    >0, <3
 .It \&br     Ta    \&No     Ta    \&No     Ta    0

+.It \&sp     Ta    \&No     Ta    \&No     Ta    1

 .El
 .\" SECTION---------------------------------------------
 .Sh COMPATIBILITY
 This section documents compatibility with other roff implementations, at
 .El
 .\" SECTION---------------------------------------------
 .Sh COMPATIBILITY
 This section documents compatibility with other roff implementations, at

-this time limited to 
+this time limited to

 .Xr groff 1 .
 .Xr groff 1 .

-The term 
+The term

 .Qq historic groff
 .Qq historic groff

-refers to those versions before the 
+refers to those versions before the

 .Pa doc.tmac
 .Pa doc.tmac

-file re-write 
+file re-write

 .Pq somewhere between 1.15 and 1.19 .
 .\" PARAGRAPH------------
 .Pp
 .Bl -dash -compact
 .\" LIST-ITEM
 .It
 .Pq somewhere between 1.15 and 1.19 .
 .\" PARAGRAPH------------
 .Pp
 .Bl -dash -compact
 .\" LIST-ITEM
 .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.
+.\" LIST-ITEM
+.It
+The
+.Sq \&sp
+macro does not accept negative numbers.
+.\" LIST-ITEM
+.It

 Some character sequences in groff are not handled depending on escape
 Some character sequences in groff are not handled depending on escape

-style, e.g., 
+style, e.g.,

 .Sq \e(ba
 and
 .Sq \e*(Ba
 .Sq \e(ba
 and
 .Sq \e*(Ba


@@ -450,32 +485,32 @@ some block-level macros) are now callable, conforming to the
 non-historic groff version.
 .\" LIST-ITEM
 .It
 non-historic groff version.
 .\" LIST-ITEM
 .It

-The vertical bar 
+The vertical bar

 .Sq \(ba
 made historic groff
 .Qq go orbital
 but is a proper delimiter in this implementation.
 .\" LIST-ITEM
 .It
 .Sq \(ba
 made historic groff
 .Qq go orbital
 but is a proper delimiter in this implementation.
 .\" LIST-ITEM
 .It

-.Sq \&.It \-nested
+.Sq \&It \-nested

 is assumed for all lists (it wasn't in historic groff): any list may be
 nested and
 .Sq \-enum
 lists will restart the sequence only for the sub-list.
 .\" LIST-ITEM
 .It
 is assumed for all lists (it wasn't in historic groff): any list may be
 nested and
 .Sq \-enum
 lists will restart the sequence only for the sub-list.
 .\" LIST-ITEM
 .It

-.Sq \&.It \-column
+.Sq \&It \-column

 syntax where column widths may be preceded by other arguments (instead
 of proceeded) is not supported.
 .\" LIST-ITEM
 .It
 syntax where column widths may be preceded by other arguments (instead
 of proceeded) is not supported.
 .\" LIST-ITEM
 .It

-The 
-.Sq \&.At
+The
+.Sq \&At

 macro only accepts a single parameter.
 .\" LIST-ITEM
 .It
 Some manuals use
 macro only accepts a single parameter.
 .\" LIST-ITEM
 .It
 Some manuals use

-.Sq \&.Li
+.Sq \&Li

 incorrectly by following it with a reserved character and expecting the
 delimiter to render.  This is not supported.
 .\" LIST-ITEM
 incorrectly by following it with a reserved character and expecting the
 delimiter to render.  This is not supported.
 .\" LIST-ITEM


@@ -486,8 +521,8 @@ it will obviously not render the subsequent sequence.  Even newer
 versions of groff seem to dither on this.
 .\" LIST-ITEM
 .It
 versions of groff seem to dither on this.
 .\" LIST-ITEM
 .It

-In groff, the 
-.Sq \&.Fo
+In groff, the
+.Sq \&Fo

 macro only produces the first parameter.  This is no longer the case.
 .El
 .\" SECTION---------------------------------------------
 macro only produces the first parameter.  This is no longer the case.
 .El
 .\" SECTION---------------------------------------------


@@ -498,7 +533,7 @@ macro only produces the first parameter.  This is no longer the case.
 .Sh AUTHORS
 The
 .Nm
 .Sh AUTHORS
 The
 .Nm

-utility was written by 
+reference was written by

 .An Kristaps Dzonsons Aq kristaps@kth.se .
 .\" SECTION---------------------------------------------
 .Sh CAVEATS
 .An Kristaps Dzonsons Aq kristaps@kth.se .
 .\" SECTION---------------------------------------------
 .Sh CAVEATS


@@ -508,69 +543,69 @@ There are many ambiguous parts of mdoc.
 .Bl -dash -compact
 .\" LIST-ITEM
 .It
 .Bl -dash -compact
 .\" LIST-ITEM
 .It

-.Sq \&.Fa
-should be 
-.Sq \&.Va
+.Sq \&Fa
+should be
+.Sq \&Va

 as function arguments are variables.
 .\" LIST-ITEM
 .It
 as function arguments are variables.
 .\" LIST-ITEM
 .It

-.Sq \&.Ft
+.Sq \&Ft

 should be
 should be

-.Sq \&.Vt
+.Sq \&Vt

 as function return types are still types.  Furthermore, the
 as function return types are still types.  Furthermore, the

-.Sq \&.Ft
+.Sq \&Ft

 should be removed and
 should be removed and

-.Sq \&.Fo ,
+.Sq \&Fo ,

 which ostensibly follows it, should follow the same convention as
 which ostensibly follows it, should follow the same convention as

-.Sq \&.Va .
+.Sq \&Va .

 .\" LIST-ITEM
 .It
 .\" LIST-ITEM
 .It

-.Sq \&.Va
+.Sq \&Va

 should formalise that only one or two arguments are acceptable: a
 variable name and optional, preceding type.
 .\" LIST-ITEM
 .It
 should formalise that only one or two arguments are acceptable: a
 variable name and optional, preceding type.
 .\" LIST-ITEM
 .It

-.Sq \&.Fd
+.Sq \&Fd

 is ambiguous.  It's commonly used to indicate an include file in the
 is ambiguous.  It's commonly used to indicate an include file in the

-synopsis section.  
-.Sq \&.In
+synopsis section.
+.Sq \&In

 should be used, instead.
 .\" LIST-ITEM
 .It
 Only the
 .Sq \-literal
 argument to
 should be used, instead.
 .\" LIST-ITEM
 .It
 Only the
 .Sq \-literal
 argument to

-.Sq \&.Bd
+.Sq \&Bd

 makes sense.  The remaining ones should be removed.
 .\" LIST-ITEM
 .It
 makes sense.  The remaining ones should be removed.
 .\" LIST-ITEM
 .It

-The 
-.Sq \&.Xo
+The
+.Sq \&Xo

 and
 and

-.Sq \&.Xc
+.Sq \&Xc

 macros should be deprecated.
 .\" LIST-ITEM
 .It
 The
 macros should be deprecated.
 .\" LIST-ITEM
 .It
 The

-.Sq \&.Dt
+.Sq \&Dt

 macro lacks clarity.  It should be absolutely clear which title will
 render when formatting the manual page.
 .\" LIST-ITEM
 .It
 A
 macro lacks clarity.  It should be absolutely clear which title will
 render when formatting the manual page.
 .\" LIST-ITEM
 .It
 A

-.Sq \&.Lx
-should be provided for Linux (\(`a la 
-.Sq \&.Ox ,
-.Sq \&.Nx 
+.Sq \&Lx
+should be provided for Linux (\(`a la
+.Sq \&Ox ,
+.Sq \&Nx

 etc.).
 .\" LIST-ITEM
 .It
 There's no way to refer to references in
 etc.).
 .\" LIST-ITEM
 .It
 There's no way to refer to references in

-.Sq \&.Rs/.Re
+.Sq \&Rs/Re

 blocks.
 .\" LIST-ITEM
 .It
 blocks.
 .\" LIST-ITEM
 .It

-The \-split and \-nosplit arguments to 
-.Sq \&.An
+The \-split and \-nosplit arguments to
+.Sq \&An

 are inane.
 .El
 are inane.
 .El