During validation, drop .br before a text line starting with a

[mandoc.git] / roff.7

diff --git a/roff.7 b/roff.7
index c78edfd1df16804585855e13d3c36f2e063ea1f7..ad6784537d666adb87f0d82b9730e1dbbc6fa049 100644 (file)
--- a/roff.7
+++ b/roff.7
@@ -1,4 +1,4 @@
-.\"    $Id: roff.7,v 1.103 2018/08/23 14:29:38 schwarze Exp $
+.\"    $Id: roff.7,v 1.107 2018/10/04 15:32:09 schwarze Exp $

 .\"
 .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010-2018 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010-2018 Ingo Schwarze <schwarze@openbsd.org>


@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"

-.Dd $Mdocdate: August 23 2018 $
+.Dd $Mdocdate: October 4 2018 $

 .Dt ROFF 7
 .Os
 .Sh NAME
 .Dt ROFF 7
 .Os
 .Sh NAME


@@ -39,17 +39,14 @@ or
 code.
 To properly format such manuals, the
 .Xr mandoc 1
 code.
 To properly format such manuals, the
 .Xr mandoc 1

-utility supports a tiny subset of
+utility supports a subset of

 .Nm
 requests and escapes.
 .Nm
 requests and escapes.

-Only these requests and escapes supported by
+Even though this manual page lists all
+.Nm
+requests, it only has partial information about requests not supported by

 .Xr mandoc 1
 .Xr mandoc 1

-are documented in the present manual,
-together with the basic language syntax shared by
-.Nm ,
-.Xr mdoc 7 ,
-and
-.Xr man 7 .
+and about language features that do not matter for manual pages.

 For complete
 .Nm
 manuals, consult the
 For complete
 .Nm
 manuals, consult the


@@ -193,7 +190,6 @@ Many requests and macros support scaled widths for their arguments.
 The syntax for a scaled width is
 .Sq Li [+-]?[0-9]*.[0-9]*[:unit:] ,
 where a decimal must be preceded or followed by at least one digit.
 The syntax for a scaled width is
 .Sq Li [+-]?[0-9]*.[0-9]*[:unit:] ,
 where a decimal must be preceded or followed by at least one digit.

-Negative numbers, while accepted, are truncated to zero.

 .Pp
 The following scaling units are accepted:
 .Pp
 .Pp
 The following scaling units are accepted:
 .Pp


@@ -309,7 +305,7 @@ Macros are provided by the
 and
 .Xr man 7
 languages and can be defined by the
 and
 .Xr man 7
 languages and can be defined by the

-.Sx \&de
+.Ic \&de

 request.
 When called, they follow the same syntax as requests, except that
 macro arguments may optionally be quoted by enclosing them
 request.
 When called, they follow the same syntax as requests, except that
 macro arguments may optionally be quoted by enclosing them


@@ -415,7 +411,7 @@ compatibility mode at all, it handles this request as an alias for
 .It Ic \&as Ar stringname Op Ar string
 Append to a user-defined string.
 The syntax of this request is the same as that of
 .It Ic \&as Ar stringname Op Ar string
 Append to a user-defined string.
 The syntax of this request is the same as that of

-.Sx \&ds .
+.Ic \&ds .

 If a user-defined string with the specified name does not yet exist,
 it is set to the empty string before appending.
 .It Ic \&as1 Ar stringname Op Ar string
 If a user-defined string with the specified name does not yet exist,
 it is set to the empty string before appending.
 .It Ic \&as1 Ar stringname Op Ar string


@@ -507,9 +503,16 @@ This is a groff extension and currently ignored.
 .It Ic \&ch Ar macroname Op Ar dist
 Change a trap location.
 Currently ignored.
 .It Ic \&ch Ar macroname Op Ar dist
 Change a trap location.
 Currently ignored.

-.It Ic \&char Ar glyphname Op Ar string
-Define a new glyph.
-Currently unsupported.
+.It Ic \&char Ar glyph Op Ar string
+Define or redefine the ASCII character or character escape sequence
+.Ar glyph
+to be rendered as
+.Ar string ,
+which can be empty.
+Only partially supported in
+.Xr mandoc 1 ;
+may interact incorrectly with
+.Ic \&tr .

 .It Ic \&chop Ar stringname
 Remove the last character from a macro, string, or diversion.
 Currently unsupported.
 .It Ic \&chop Ar stringname
 Remove the last character from a macro, string, or diversion.
 Currently unsupported.


@@ -1202,7 +1205,7 @@ While evaluating the
 the unit suffixes described below
 .Sx Scaling Widths
 are ignored.
 the unit suffixes described below
 .Sx Scaling Widths
 are ignored.

-.It Ic \&it Ar expression macro
+.It Ic \&itc Ar expression macro

 Set an input line trap, not counting lines ending with \ec.
 Currently unsupported.
 .It Ic \&IX Ar class keystring
 Set an input line trap, not counting lines ending with \ec.
 Currently unsupported.
 .It Ic \&IX Ar class keystring


@@ -1591,7 +1594,7 @@ Ignored because insecure.
 Re-start a table layout, retaining the options of the prior table
 invocation.
 See
 Re-start a table layout, retaining the options of the prior table
 invocation.
 See

-.Sx \&TS .
+.Ic \&TS .

 .It Ic \&ta Op Ar width ... Op Cm T Ar width ...
 Set tab stops.
 Each
 .It Ic \&ta Op Ar width ... Op Cm T Ar width ...
 Set tab stops.
 Each


@@ -1612,7 +1615,7 @@ Currently unsupported.
 .It Ic \&TE
 End a table context.
 See
 .It Ic \&TE
 End a table context.
 See

-.Sx \&TS .
+.Ic \&TS .

 .It Ic \&ti Oo Cm + Ns | Ns Cm - Oc Ns Ar width
 Break the output line and indent the next output line by
 .Ar width .
 .It Ic \&ti Oo Cm + Ns | Ns Cm - Oc Ns Ar width
 Break the output line and indent the next output line by
 .Ar width .


@@ -1715,8 +1718,12 @@ This is a Heirloom extension and currently ignored.
 Set a page location trap.
 Currently unsupported.
 .It Ic \&while Ar condition body
 Set a page location trap.
 Currently unsupported.
 .It Ic \&while Ar condition body

-Repeated execution while a condition is true.
-Currently unsupported.
+Repeated execution while a
+.Ar condition
+is true, with syntax similar to
+.Ic \&if .
+Currently implemented with two restrictions: cannot nest,
+and each loop must start and end in the same scope.

 .It Ic \&write Oo \(dq Oc Ns Ar string
 Write to an open file.
 Ignored because insecure.
 .It Ic \&write Oo \(dq Oc Ns Ar string
 Write to an open file.
 Ignored because insecure.


@@ -1732,10 +1739,10 @@ This is a Heirloom extension and currently ignored.
 .El
 .Ss Numerical expressions
 The
 .El
 .Ss Numerical expressions
 The

-.Sx \&nr ,
-.Sx \&if ,
+.Ic \&nr ,
+.Ic \&if ,

 and
 and

-.Sx \&ie
+.Ic \&ie

 requests accept integer numerical expressions as arguments.
 These are always evaluated using the C
 .Vt int
 requests accept integer numerical expressions as arguments.
 These are always evaluated using the C
 .Vt int


@@ -1823,54 +1830,59 @@ described in the
 .Sx LANGUAGE SYNTAX
 section above.
 .Pp
 .Sx LANGUAGE SYNTAX
 section above.
 .Pp

-A backslash followed by any character not listed here
+In
+.Xr mandoc 1 ,
+a backslash followed by any character not listed here

 simply prints that character itself.
 simply prints that character itself.

-.Ss \e<newline>
+.Bl -tag -width Ds
+.It Ic \e<newline>

 A backslash at the end of an input line can be used to continue the
 logical input line on the next physical input line, joining the text
 on both lines together as if it were on a single input line.
 A backslash at the end of an input line can be used to continue the
 logical input line on the next physical input line, joining the text
 on both lines together as if it were on a single input line.

-.Ss \e<space>
+.It Ic \e<space>

 The escape sequence backslash-space
 .Pq Sq \e\ \&
 is an unpaddable space-sized non-breaking space character; see
 .Sx Whitespace .
 The escape sequence backslash-space
 .Pq Sq \e\ \&
 is an unpaddable space-sized non-breaking space character; see
 .Sx Whitespace .

-.Ss \e\(dq
+.It Ic \e\(dq

 The rest of the input line is treated as
 .Sx Comments .
 The rest of the input line is treated as
 .Sx Comments .

-.Ss \e#
+.It Ic \e#

 Line continuation with comment.
 Discard the rest of the physical input line and continue the logical
 input line on the next physical input line, joining the text on
 both lines together as if it were on a single input line.
 This is a groff extension.
 Line continuation with comment.
 Discard the rest of the physical input line and continue the logical
 input line on the next physical input line, joining the text on
 both lines together as if it were on a single input line.
 This is a groff extension.

-.Ss \e$ Ns Ar arg
+.It Ic \e$ Ns Ar arg

 Macro argument expansion, see
 Macro argument expansion, see

-.Sx de .
-.Ss \e%
+.Ic \&de .
+.It Ic \e%

 Hyphenation allowed at this point of the word; ignored by
 .Xr mandoc 1 .
 Hyphenation allowed at this point of the word; ignored by
 .Xr mandoc 1 .

-.Ss \e&
+.It Ic \e&

 Non-printing zero-width character; see
 .Sx Whitespace .
 Non-printing zero-width character; see
 .Sx Whitespace .

-.Ss \e\(aq
+.It Ic \e\(aq

 Acute accent special character; use
 Acute accent special character; use

-.Sq \e(aa
+.Ic \e(aa

 instead.
 instead.

-.Ss \e( Ns Ar cc
+.It Ic \e( Ns Ar cc

 .Sx Special Characters
 with two-letter names, see
 .Xr mandoc_char 7 .
 .Sx Special Characters
 with two-letter names, see
 .Xr mandoc_char 7 .

-.Ss \e* Ns Bq Ar name
+.It Ic \e*[ Ns Ar name Ns Ic \&]

 Interpolate the string with the
 .Ar name .
 For short names, there are variants
 Interpolate the string with the
 .Ar name .
 For short names, there are variants

-.No \e* Ns Ar c
+.Ic \e* Ns Ar c

 and
 and

-.No \e*( Ns Ar cc .
+.Ic \e*( Ns Ar cc .

 .Pp
 One string is predefined on the
 .Nm
 .Pp
 One string is predefined on the
 .Nm

-language level: \e*(.T expands to the name of the output device,
+language level:
+.Ic \e*(.T
+expands to the name of the output device,

 for example ascii, utf8, ps, pdf, html, or markdown.
 .Pp
 Macro sets traditionally predefine additional strings which are not
 for example ascii, utf8, ps, pdf, html, or markdown.
 .Pp
 Macro sets traditionally predefine additional strings which are not


@@ -1886,43 +1898,43 @@ Strings can be defined, changed, and deleted with the
 and
 .Ic \&rm
 requests.
 and
 .Ic \&rm
 requests.

-.Ss \e,
+.It Ic \e,

 Left italic correction (groff extension); ignored by
 .Xr mandoc 1 .
 Left italic correction (groff extension); ignored by
 .Xr mandoc 1 .

-.Ss \e-
+.It Ic \e-

 Special character
 .Dq mathematical minus sign .
 Special character
 .Dq mathematical minus sign .

-.Ss \e/
+.It Ic \e/

 Right italic correction (groff extension); ignored by
 .Xr mandoc 1 .
 Right italic correction (groff extension); ignored by
 .Xr mandoc 1 .

-.Ss \e Ns Bq Ar name
+.It Ic \e[ Ns Ar name Ns Ic \&]

 .Sx Special Characters
 with names of arbitrary length, see
 .Xr mandoc_char 7 .
 .Sx Special Characters
 with names of arbitrary length, see
 .Xr mandoc_char 7 .

-.Ss \e^
+.It Ic \e^

 One-twelfth em half-narrow space character, effectively zero-width in
 .Xr mandoc 1 .
 One-twelfth em half-narrow space character, effectively zero-width in
 .Xr mandoc 1 .

-.Ss \e`
+.It Ic \e`

 Grave accent special character; use
 Grave accent special character; use

-.Sq \e(ga
+.Ic \e(ga

 instead.
 instead.

-.Ss \e{
+.It Ic \e{

 Begin conditional input; see
 Begin conditional input; see

-.Sx if .
-.Ss \e\(ba
+.Ic \&if .
+.It Ic \e\(ba

 One-sixth em narrow space character, effectively zero-width in
 .Xr mandoc 1 .
 One-sixth em narrow space character, effectively zero-width in
 .Xr mandoc 1 .

-.Ss \e}
+.It Ic \e}

 End conditional input; see
 End conditional input; see

-.Sx if .
-.Ss \e~
+.Ic \&if .
+.It Ic \e~

 Paddable non-breaking space character.
 Paddable non-breaking space character.

-.Ss \e0
+.It Ic \e0

 Digit width space character.
 Digit width space character.

-.Ss \eA\(aq Ns Ar string Ns \(aq
+.It Ic \eA\(aq Ns Ar string Ns Ic \(aq

 Anchor definition; ignored by
 .Xr mandoc 1 .
 Anchor definition; ignored by
 .Xr mandoc 1 .

-.Ss \eB\(aq Ns Ar string Ns \(aq
+.It Ic \eB\(aq Ns Ar string Ns Ic \(aq

 Interpolate
 .Sq 1
 if
 Interpolate
 .Sq 1
 if


@@ -1932,145 +1944,145 @@ conforms to the syntax of
 explained above and
 .Sq 0
 otherwise.
 explained above and
 .Sq 0
 otherwise.

-.Ss \eb\(aq Ns Ar string Ns \(aq
+.It Ic \eb\(aq Ns Ar string Ns Ic \(aq

 Bracket building function; ignored by
 .Xr mandoc 1 .
 Bracket building function; ignored by
 .Xr mandoc 1 .

-.Ss \eC\(aq Ns Ar name Ns \(aq
+.It Ic \eC\(aq Ns Ar name Ns Ic \(aq

 .Sx Special Characters
 with names of arbitrary length.
 .Sx Special Characters
 with names of arbitrary length.

-.Ss \ec
+.It Ic \ec

 When encountered at the end of an input text line,
 the next input text line is considered to continue that line,
 even if there are request or macro lines in between.
 No whitespace is inserted.
 When encountered at the end of an input text line,
 the next input text line is considered to continue that line,
 even if there are request or macro lines in between.
 No whitespace is inserted.

-.Ss \eD\(aq Ns Ar string Ns \(aq
+.It Ic \eD\(aq Ns Ar string Ns Ic \(aq

 Draw graphics function; ignored by
 .Xr mandoc 1 .
 Draw graphics function; ignored by
 .Xr mandoc 1 .

-.Ss \ed
+.It Ic \ed

 Move down by half a line; ignored by
 .Xr mandoc 1 .
 Move down by half a line; ignored by
 .Xr mandoc 1 .

-.Ss \ee
+.It Ic \ee

 Backslash special character.
 Backslash special character.

-.Ss \eF Ns Bq Ar name
+.It Ic \eF[ Ns Ar name Ns Ic \&]

 Switch font family (groff extension); ignored by
 .Xr mandoc 1 .
 For short names, there are variants
 Switch font family (groff extension); ignored by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \eF Ns Ar c
+.Ic \eF Ns Ar c

 and
 and

-.No \eF( Ns Ar cc .
-.Ss \ef Ns Bq Ar name
+.Ic \eF( Ns Ar cc .
+.It Ic \ef[ Ns Ar name Ns Ic \&]

 Switch to the font
 .Ar name ,
 see
 .Sx Text Decoration .
 For short names, there are variants
 Switch to the font
 .Ar name ,
 see
 .Sx Text Decoration .
 For short names, there are variants

-.No \ef Ns Ar c
+.Ic \ef Ns Ar c

 and
 and

-.No \ef( Ns Ar cc .
-.Ss \eg Ns Bq Ar name
+.Ic \ef( Ns Ar cc .
+.It Ic \eg[ Ns Ar name Ns Ic \&]

 Interpolate the format of a number register; ignored by
 .Xr mandoc 1 .
 For short names, there are variants
 Interpolate the format of a number register; ignored by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \eg Ns Ar c
+.Ic \eg Ns Ar c

 and
 and

-.No \eg( Ns Ar cc .
-.Ss \eH\(aq Ns Oo +|- Oc Ns Ar number Ns \(aq
+.Ic \eg( Ns Ar cc .
+.It Ic \eH\(aq Ns Oo +|- Oc Ns Ar number Ns Ic \(aq

 Set the height of the current font; ignored by
 .Xr mandoc 1 .
 Set the height of the current font; ignored by
 .Xr mandoc 1 .

-.Ss \eh\(aq Ns Oo Cm \&| Oc Ns Ar width Ns \(aq
+.It Ic \eh\(aq Ns Oo Cm \&| Oc Ns Ar width Ns Ic \(aq

 Horizontal motion.
 If the vertical bar is given, the motion is relative to the current
 indentation.
 Otherwise, it is relative to the current position.
 The default scaling unit is
 .Cm m .
 Horizontal motion.
 If the vertical bar is given, the motion is relative to the current
 indentation.
 Otherwise, it is relative to the current position.
 The default scaling unit is
 .Cm m .

-.Ss \ek Ns Bq Ar name
+.It Ic \ek[ Ns Ar name Ns Ic \&]

 Mark horizontal input place in register; ignored by
 .Xr mandoc 1 .
 For short names, there are variants
 Mark horizontal input place in register; ignored by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \ek Ns Ar c
+.Ic \ek Ns Ar c

 and
 and

-.No \ek( Ns Ar cc .
-.Ss \eL\(aq Ns Ar number Ns Oo Ar c Oc Ns \(aq
+.Ic \ek( Ns Ar cc .
+.It Ic \eL\(aq Ns Ar number Ns Oo Ar c Oc Ns Ic \(aq

 Vertical line drawing function; ignored by
 .Xr mandoc 1 .
 Vertical line drawing function; ignored by
 .Xr mandoc 1 .

-.Ss \el\(aq Ns Ar width Ns Oo Ar c Oc Ns \(aq
+.It Ic \el\(aq Ns Ar width Ns Oo Ar c Oc Ns Ic \(aq

 Draw a horizontal line of
 .Ar width
 using the glyph
 .Ar c .
 Draw a horizontal line of
 .Ar width
 using the glyph
 .Ar c .

-.Ss \eM Ns Bq Ar name
+.It Ic \eM[ Ns Ar name Ns Ic \&]

 Set fill (background) color (groff extension); ignored by
 .Xr mandoc 1 .
 For short names, there are variants
 Set fill (background) color (groff extension); ignored by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \eM Ns Ar c
+.Ic \eM Ns Ar c

 and
 and

-.No \eM( Ns Ar cc .
-.Ss \em Ns Bq Ar name
+.Ic \eM( Ns Ar cc .
+.It Ic \em[ Ns Ar name Ns Ic \&]

 Set glyph drawing color (groff extension); ignored by
 .Xr mandoc 1 .
 For short names, there are variants
 Set glyph drawing color (groff extension); ignored by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \em Ns Ar c
+.Ic \em Ns Ar c

 and
 and

-.No \em( Ns Ar cc .
-.Ss \eN\(aq Ns Ar number Ns \(aq
+.Ic \em( Ns Ar cc .
+.It Ic \eN\(aq Ns Ar number Ns Ic \(aq

 Character
 .Ar number
 on the current font.
 Character
 .Ar number
 on the current font.

-.Ss \en Ns Oo +|- Oc Ns Bq Ar name
+.It Ic \en Ns Oo +|- Oc Ns Ic \&[ Ns Ar name Ns Ic \&]

 Interpolate the number register
 .Ar name .
 For short names, there are variants
 Interpolate the number register
 .Ar name .
 For short names, there are variants

-.No \en Ns Ar c
+.Ic \en Ns Ar c

 and
 and

-.No \en( Ns Ar cc .
+.Ic \en( Ns Ar cc .

 If the optional sign is specified,
 the register is first incremented or decremented by the
 .Ar stepsize
 that was specified in the relevant
 .Ic \&nr
 request, and the changed value is interpolated.
 If the optional sign is specified,
 the register is first incremented or decremented by the
 .Ar stepsize
 that was specified in the relevant
 .Ic \&nr
 request, and the changed value is interpolated.

-.Ss \eo\(aq Ns Ar string Ns \(aq
+.It Ic \eo\(aq Ns Ar string Ns Ic \(aq

 Overstrike, writing all the characters contained in the
 .Ar string
 to the same output position.
 In terminal and HTML output modes,
 only the last one of the characters is visible.
 Overstrike, writing all the characters contained in the
 .Ar string
 to the same output position.
 In terminal and HTML output modes,
 only the last one of the characters is visible.

-.Ss \ep
+.It Ic \ep

 Break the output line at the end of the current word.
 Break the output line at the end of the current word.

-.Ss \eR\(aq Ns Ar name Oo +|- Oc Ns Ar number Ns \(aq
+.It Ic \eR\(aq Ns Ar name Oo +|- Oc Ns Ar number Ns Ic \(aq

 Set number register; ignored by
 .Xr mandoc 1 .
 Set number register; ignored by
 .Xr mandoc 1 .

-.Ss \eS\(aq Ns Ar number Ns \(aq
+.It Ic \eS\(aq Ns Ar number Ns Ic \(aq

 Slant output; ignored by
 .Xr mandoc 1 .
 Slant output; ignored by
 .Xr mandoc 1 .

-.Ss \es\(aq Ns Oo +|- Oc Ns Ar number Ns \(aq
+.It Ic \es\(aq Ns Oo +|- Oc Ns Ar number Ns Ic \(aq

 Change point size; ignored by
 .Xr mandoc 1 .
 Alternative forms
 Change point size; ignored by
 .Xr mandoc 1 .
 Alternative forms

-.No \es Ns Oo +|- Oc Ns Ar n ,
-.No \es Ns Oo +|- Oc Ns \(aq Ns Ar number Ns \(aq ,
-.No \es Ns Bq Oo +|- Oc Ns Ar number ,
+.Ic \es Ns Oo +|- Oc Ns Ar n ,
+.Ic \es Ns Oo +|- Oc Ns Ic \(aq Ns Ar number Ns Ic \(aq ,
+.Ic \es[ Ns Oo +|- Oc Ns Ar number Ns Ic \&] ,

 and
 and

-.No \es Ns Oo +|- Oc Ns Bq Ar number
+.Ic \es Ns Oo +|- Oc Ns Ic \&[ Ns Ar number Ns Ic \&]

 are also parsed and ignored.
 are also parsed and ignored.

-.Ss \et
+.It Ic \et

 Horizontal tab; ignored by
 .Xr mandoc 1 .
 Horizontal tab; ignored by
 .Xr mandoc 1 .

-.Ss \eu
+.It Ic \eu

 Move up by half a line; ignored by
 .Xr mandoc 1 .
 Move up by half a line; ignored by
 .Xr mandoc 1 .

-.Ss \eV Ns Bq Ar name
+.It Ic \eV[ Ns Ar name Ns Ic \&]

 Interpolate an environment variable; ignored by
 .Xr mandoc 1 .
 For short names, there are variants
 Interpolate an environment variable; ignored by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \eV Ns Ar c
+.Ic \eV Ns Ar c

 and
 and

-.No \eV( Ns Ar cc .
-.Ss \ev\(aq Ns Ar number Ns \(aq
+.Ic \eV( Ns Ar cc .
+.It Ic \ev\(aq Ns Ar number Ns Ic \(aq

 Vertical motion; ignored by
 .Xr mandoc 1 .
 Vertical motion; ignored by
 .Xr mandoc 1 .

-.Ss \ew\(aq Ns Ar string Ns \(aq
+.It Ic \ew\(aq Ns Ar string Ns Ic \(aq

 Interpolate the width of the
 .Ar string .
 The
 Interpolate the width of the
 .Ar string .
 The


@@ -2079,49 +2091,49 @@ implementation assumes that after expansion of user-defined strings, the
 .Ar string
 only contains normal characters, no escape sequences, and that each
 character has a width of 24 basic units.
 .Ar string
 only contains normal characters, no escape sequences, and that each
 character has a width of 24 basic units.

-.Ss \eX\(aq Ns Ar string Ns \(aq
+.It Ic \eX\(aq Ns Ar string Ns Ic \(aq

 Output
 .Ar string
 as device control function; ignored in nroff mode and by
 .Xr mandoc 1 .
 Output
 .Ar string
 as device control function; ignored in nroff mode and by
 .Xr mandoc 1 .

-.Ss \ex\(aq Ns Ar number Ns \(aq
+.It Ic \ex\(aq Ns Ar number Ns Ic \(aq

 Extra line space function; ignored by
 .Xr mandoc 1 .
 Extra line space function; ignored by
 .Xr mandoc 1 .

-.Ss \eY Ns Bq Ar name
+.It Ic \eY[ Ns Ar name Ns Ic \&]

 Output a string as a device control function; ignored in nroff mode and by
 .Xr mandoc 1 .
 For short names, there are variants
 Output a string as a device control function; ignored in nroff mode and by
 .Xr mandoc 1 .
 For short names, there are variants

-.No \eY Ns Ar c
+.Ic \eY Ns Ar c

 and
 and

-.No \eY( Ns Ar cc .
-.Ss \eZ\(aq Ns Ar string Ns \(aq
+.Ic \eY( Ns Ar cc .
+.It Ic \eZ\(aq Ns Ar string Ns Ic \(aq

 Print
 .Ar string
 with zero width and height; ignored by
 .Xr mandoc 1 .
 Print
 .Ar string
 with zero width and height; ignored by
 .Xr mandoc 1 .

-.Ss \ez
+.It Ic \ez

 Output the next character without advancing the cursor position.
 Output the next character without advancing the cursor position.

+.El

 .Sh COMPATIBILITY
 The
 .Xr mandoc 1
 implementation of the
 .Nm
 .Sh COMPATIBILITY
 The
 .Xr mandoc 1
 implementation of the
 .Nm

-language is intentionally incomplete.
-Unimplemented features include:
+language is incomplete.
+Major unimplemented features include:

 .Pp
 .Bl -dash -compact
 .It
 For security reasons,
 .Xr mandoc 1
 never reads or writes external files except via
 .Pp
 .Bl -dash -compact
 .It
 For security reasons,
 .Xr mandoc 1
 never reads or writes external files except via

-.Sx \&so
+.Ic \&so

 requests with safe relative paths.
 .It
 There is no automatic hyphenation, no adjustment to the right margin,
 requests with safe relative paths.
 .It
 There is no automatic hyphenation, no adjustment to the right margin,

-and no centering; the output is always set flush-left.
+and very limited support for centering; the output is always set flush-left.

 .It
 .It

-Support for setting tabulator positions
-and tabulator and leader characters is missing,
+Support for setting tabulator and leader characters is missing,

 and support for manually changing indentation is limited.
 .It
 The
 and support for manually changing indentation is limited.
 .It
 The


@@ -2132,14 +2144,14 @@ output media.
 .It
 Width measurements are implemented in a crude way
 and often yield wrong results.
 .It
 Width measurements are implemented in a crude way
 and often yield wrong results.

-Explicit movement requests and escapes are ignored.
+Support for explicit movement requests and escapes is limited.

 .It
 There is no concept of output pages, no support for floats,
 graphics drawing, and picture inclusion;
 terminal output is always continuous.
 .It
 .It
 There is no concept of output pages, no support for floats,
 graphics drawing, and picture inclusion;
 terminal output is always continuous.
 .It

-Requests regarding color, font families, and glyph manipulation
-are ignored.
+Requests regarding color, font families, font sizes,
+and glyph manipulation are ignored.

 Font support is very limited.
 Kerning is not implemented, and no ligatures are produced.
 .It
 Font support is very limited.
 Kerning is not implemented, and no ligatures are produced.
 .It


@@ -2147,12 +2159,12 @@ The
 .Qq \(aq
 macro control character does not suppress output line breaks.
 .It
 .Qq \(aq
 macro control character does not suppress output line breaks.
 .It

-Diversions are not implemented,
+Diversions and environments are not implemented,

 and support for traps is very incomplete.
 .It
 and support for traps is very incomplete.
 .It

-While recursion is supported,
-.Sx \&while
-loops are not.
+Use of macros is not supported inside
+.Xr tbl 7
+code.

 .El
 .Pp
 The special semantics of the
 .El
 .Pp
 The special semantics of the