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Diff for /mandoc/mdoc.7 between version 1.215 and 1.227

version 1.215, 2012/06/20 22:06:30 version 1.227, 2014/02/16 14:26:55
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 .\"     $Id$  .\"     $Id$
 .\"  .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>  .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>  .\" Copyright (c) 2010, 2011, 2013 Ingo Schwarze <schwarze@openbsd.org>
 .\"  .\"
 .\" Permission to use, copy, modify, and distribute this software for any  .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above  .\" purpose with or without fee is hereby granted, provided that the above
Line 125  file for a utility
Line 125  file for a utility
 \&.Nm progname  \&.Nm progname
 \&.Nd one line about what it does  \&.Nd one line about what it does
 \&.\e\(dq .Sh LIBRARY  \&.\e\(dq .Sh LIBRARY
 \&.\e\(dq For sections 2, 3, & 9 only.  \&.\e\(dq For sections 2, 3, and 9 only.
 \&.\e\(dq Not used in OpenBSD.  \&.\e\(dq Not used in OpenBSD.
 \&.Sh SYNOPSIS  \&.Sh SYNOPSIS
 \&.Nm progname  \&.Nm progname
Line 138  utility processes files ...
Line 138  utility processes files ...
 \&.\e\(dq .Sh IMPLEMENTATION NOTES  \&.\e\(dq .Sh IMPLEMENTATION NOTES
 \&.\e\(dq Not used in OpenBSD.  \&.\e\(dq Not used in OpenBSD.
 \&.\e\(dq .Sh RETURN VALUES  \&.\e\(dq .Sh RETURN VALUES
 \&.\e\(dq For sections 2, 3, & 9 only.  \&.\e\(dq For sections 2, 3, and 9 function return values only.
 \&.\e\(dq .Sh ENVIRONMENT  \&.\e\(dq .Sh ENVIRONMENT
 \&.\e\(dq For sections 1, 6, 7, & 8 only.  \&.\e\(dq For sections 1, 6, 7, and 8 only.
 \&.\e\(dq .Sh FILES  \&.\e\(dq .Sh FILES
 \&.\e\(dq .Sh EXIT STATUS  \&.\e\(dq .Sh EXIT STATUS
 \&.\e\(dq For sections 1, 6, & 8 only.  \&.\e\(dq For sections 1, 6, and 8 only.
 \&.\e\(dq .Sh EXAMPLES  \&.\e\(dq .Sh EXAMPLES
 \&.\e\(dq .Sh DIAGNOSTICS  \&.\e\(dq .Sh DIAGNOSTICS
 \&.\e\(dq For sections 1, 4, 6, 7, & 8 only.  \&.\e\(dq For sections 1, 4, 6, 7, 8, and 9 printf/stderr messages only.
 \&.\e\(dq .Sh ERRORS  \&.\e\(dq .Sh ERRORS
 \&.\e\(dq For sections 2, 3, & 9 only.  \&.\e\(dq For sections 2, 3, 4, and 9 errno settings only.
 \&.\e\(dq .Sh SEE ALSO  \&.\e\(dq .Sh SEE ALSO
 \&.\e\(dq .Xr foobar 1  \&.\e\(dq .Xr foobar 1
 \&.\e\(dq .Sh STANDARDS  \&.\e\(dq .Sh STANDARDS
Line 358  Example usages.
Line 358  Example usages.
 This often contains snippets of well-formed, well-tested invocations.  This often contains snippets of well-formed, well-tested invocations.
 Make sure that examples work properly!  Make sure that examples work properly!
 .It Em DIAGNOSTICS  .It Em DIAGNOSTICS
 Documents error conditions.  Documents error messages.
 This is most useful in section 4 manuals.  In section 4 and 9 manuals, these are usually messages printed by the
   kernel to the console and to the kernel log.
   In section 1, 6, 7, and 8, these are usually messages printed by
   userland programs to the standard error output.
   .Pp
 Historically, this section was used in place of  Historically, this section was used in place of
 .Em EXIT STATUS  .Em EXIT STATUS
 for manuals in sections 1, 6, and 8; however, this practise is  for manuals in sections 1, 6, and 8; however, this practise is
Line 369  See
Line 373  See
 .Sx \&Bl  .Sx \&Bl
 .Fl diag .  .Fl diag .
 .It Em ERRORS  .It Em ERRORS
 Documents error handling in sections 2, 3, and 9.  Documents
   .Xr errno 2
   settings in sections 2, 3, 4, and 9.
 .Pp  .Pp
 See  See
 .Sx \&Er .  .Sx \&Er .
Line 477  in the alphabetical
Line 483  in the alphabetical
 .Bl -column "Brq, Bro, Brc" description  .Bl -column "Brq, Bro, Brc" description
 .It Sx \&Lb Ta function library (one argument)  .It Sx \&Lb Ta function library (one argument)
 .It Sx \&In Ta include file (one argument)  .It Sx \&In Ta include file (one argument)
   .It Sx \&Fd Ta other preprocessor directive (>0 arguments)
 .It Sx \&Ft Ta function type (>0 arguments)  .It Sx \&Ft Ta function type (>0 arguments)
 .It Sx \&Fo , \&Fc Ta function block: Ar funcname  .It Sx \&Fo , \&Fc Ta function block: Ar funcname
 .It Sx \&Fn Ta function name:  .It Sx \&Fn Ta function name:
Line 657  for all other author listings.
Line 664  for all other author listings.
 .Pp  .Pp
 Examples:  Examples:
 .Dl \&.An -nosplit  .Dl \&.An -nosplit
 .Dl \&.An Kristaps Dzonsons \&Aq kristaps@bsd.lv  .Dl \&.An Kristaps Dzonsons \&Aq \&Mt kristaps@bsd.lv
 .Ss \&Ao  .Ss \&Ao
 Begin a block enclosed by angle brackets.  Begin a block enclosed by angle brackets.
 Does not have any head arguments.  Does not have any head arguments.
Line 711  for fixed strings to be passed verbatim as arguments, 
Line 718  for fixed strings to be passed verbatim as arguments, 
 or  or
 .Sx \&Cm .  .Sx \&Cm .
 .Ss \&At  .Ss \&At
 Formats an AT&T version.  Formats an
   .At
   version.
 Accepts one optional argument:  Accepts one optional argument:
 .Pp  .Pp
 .Bl -tag -width "v[1-7] | 32vX" -offset indent -compact  .Bl -tag -width "v[1-7] | 32vX" -offset indent -compact
Line 1089  Examples:
Line 1098  Examples:
 See also  See also
 .Sx \&Bro .  .Sx \&Bro .
 .Ss \&Bsx  .Ss \&Bsx
 Format the BSD/OS version provided as an argument, or a default value if  Format the
   .Bsx
   version provided as an argument, or a default value if
 no argument is provided.  no argument is provided.
 .Pp  .Pp
 Examples:  Examples:
Line 1109  and
Line 1120  and
 Prints  Prints
 .Dq is currently in beta test.  .Dq is currently in beta test.
 .Ss \&Bx  .Ss \&Bx
 Format the BSD version provided as an argument, or a default value if no  Format the
   .Bx
   version provided as an argument, or a default value if no
 argument is provided.  argument is provided.
 .Pp  .Pp
 Examples:  Examples:
Line 1298  It should be capitalised.
Line 1311  It should be capitalised.
 .It Ar section  .It Ar section
 The manual section.  The manual section.
 This may be one of  This may be one of
 .Ar 1  .Cm 1
 .Pq utilities ,  .Pq utilities ,
 .Ar 2  .Cm 2
 .Pq system calls ,  .Pq system calls ,
 .Ar 3  .Cm 3
 .Pq libraries ,  .Pq libraries ,
 .Ar 3p  .Cm 3p
 .Pq Perl libraries ,  .Pq Perl libraries ,
 .Ar 4  .Cm 4
 .Pq devices ,  .Pq devices ,
 .Ar 5  .Cm 5
 .Pq file formats ,  .Pq file formats ,
 .Ar 6  .Cm 6
 .Pq games ,  .Pq games ,
 .Ar 7  .Cm 7
 .Pq miscellaneous ,  .Pq miscellaneous ,
 .Ar 8  .Cm 8
 .Pq system utilities ,  .Pq system utilities ,
 .Ar 9  .Cm 9
 .Pq kernel functions ,  .Pq kernel functions ,
 .Ar X11  .Cm X11
 .Pq X Window System ,  .Pq X Window System ,
 .Ar X11R6  .Cm X11R6
 .Pq X Window System ,  .Pq X Window System ,
 .Ar unass  .Cm unass
 .Pq unassociated ,  .Pq unassociated ,
 .Ar local  .Cm local
 .Pq local system ,  .Pq local system ,
 .Ar draft  .Cm draft
 .Pq draft manual ,  .Pq draft manual ,
 or  or
 .Ar paper  .Cm paper
 .Pq paper .  .Pq paper .
 It should correspond to the manual's filename suffix and defaults to  It should correspond to the manual's filename suffix and defaults to
 .Dq 1  .Cm 1
 if unspecified.  if unspecified.
 .It Ar volume  .It Ar volume
 This overrides the volume inferred from  This overrides the volume inferred from
 .Ar section .  .Ar section .
 This field is optional, and if specified, must be one of  This field is optional, and if specified, must be one of
 .Ar USD  .Cm USD
 .Pq users' supplementary documents ,  .Pq users' supplementary documents ,
 .Ar PS1  .Cm PS1
 .Pq programmers' supplementary documents ,  .Pq programmers' supplementary documents ,
 .Ar AMD  .Cm AMD
 .Pq administrators' supplementary documents ,  .Pq administrators' supplementary documents ,
 .Ar SMM  .Cm SMM
 .Pq system managers' manuals ,  .Pq system managers' manuals ,
 .Ar URM  .Cm URM
 .Pq users' reference manuals ,  .Pq users' reference manuals ,
 .Ar PRM  .Cm PRM
 .Pq programmers' reference manuals ,  .Pq programmers' reference manuals ,
 .Ar KM  .Cm KM
 .Pq kernel manuals ,  .Pq kernel manuals ,
 .Ar IND  .Cm IND
 .Pq master index ,  .Pq master index ,
 .Ar MMI  .Cm MMI
 .Pq master index ,  .Pq master index ,
 .Ar LOCAL  .Cm LOCAL
 .Pq local manuals ,  .Pq local manuals ,
 .Ar LOC  .Cm LOC
 .Pq local manuals ,  .Pq local manuals ,
 or  or
 .Ar CON  .Cm CON
 .Pq contributed manuals .  .Pq contributed manuals .
 .It Ar arch  .It Ar arch
 This specifies the machine architecture a manual page applies to,  This specifies the machine architecture a manual page applies to,
Line 1401  See also
Line 1414  See also
 .Sx \&Er  .Sx \&Er
 and  and
 .Sx \&Ev  .Sx \&Ev
 for special-purpose constants and  for special-purpose constants,
 .Sx \&Va  .Sx \&Va
 for variable symbols.  for variable symbols, and
   .Sx \&Fd
   for listing preprocessor variable definitions in the
   .Em SYNOPSIS .
 .Ss \&Dx  .Ss \&Dx
 Format the DragonFly BSD version provided as an argument, or a default  Format the
   .Dx
   version provided as an argument, or a default
 value if no argument is provided.  value if no argument is provided.
 .Pp  .Pp
 Examples:  Examples:
Line 1562  See also
Line 1580  See also
 End a function context started by  End a function context started by
 .Sx \&Fo .  .Sx \&Fo .
 .Ss \&Fd  .Ss \&Fd
 Historically used to document include files.  Preprocessor directive, in particular for listing it in the
 This usage has been deprecated in favour of  .Em SYNOPSIS .
   Historically, it was also used to document include files.
   The latter usage has been deprecated in favour of
 .Sx \&In .  .Sx \&In .
 Do not use this macro.  
 .Pp  .Pp
   Its syntax is as follows:
   .Bd -ragged -offset indent
   .Pf \. Sx \&Fd
   .Li # Ns Ar directive
   .Op Ar argument ...
   .Ed
   .Pp
   Examples:
   .Dl \&.Fd #define sa_handler __sigaction_u.__sa_handler
   .Dl \&.Fd #define SIO_MAXNFDS
   .Dl \&.Fd #ifdef FS_DEBUG
   .Dl \&.Ft void
   .Dl \&.Fn dbg_open \(dqconst char *\(dq
   .Dl \&.Fd #endif
   .Pp
 See also  See also
 .Sx MANUAL STRUCTURE  .Sx MANUAL STRUCTURE ,
   .Sx \&In ,
 and  and
 .Sx \&In .  .Sx \&Dv .
 .Ss \&Fl  .Ss \&Fl
 Command-line flag or option.  Command-line flag or option.
 Used when listing arguments to command-line utilities.  Used when listing arguments to command-line utilities.
Line 1851  section as described in
Line 1886  section as described in
 .Pp  .Pp
 Examples:  Examples:
 .Dl \&.Lb libz  .Dl \&.Lb libz
 .Dl \&.Lb mdoc  .Dl \&.Lb libmandoc
 .Ss \&Li  .Ss \&Li
 Denotes text that should be in a  Denotes text that should be in a
 .Li literal  .Li literal
Line 1902  Its syntax is as follows:
Line 1937  Its syntax is as follows:
 .Pp  .Pp
 Examples:  Examples:
 .Dl \&.Mt discuss@manpages.bsd.lv  .Dl \&.Mt discuss@manpages.bsd.lv
   .Dl \&.An Kristaps Dzonsons \&Aq \&Mt kristaps@bsd.lv
 .Ss \&Nd  .Ss \&Nd
 A one line description of the manual's content.  A one line description of the manual's content.
 This may only be invoked in the  This may only be invoked in the
Line 2083  This macro is obsolete and not implemented in
Line 2119  This macro is obsolete and not implemented in
 .Xr mandoc 1 .  .Xr mandoc 1 .
 .Pp  .Pp
 Historical  Historical
 .Xr mdoc 7  .Nm
 packages described it as  packages described it as
 .Dq "old function type (FORTRAN)" .  .Dq "old function type (FORTRAN)" .
 .Ss \&Ox  .Ss \&Ox
Line 2324  and
Line 2360  and
 .Sx \&Sx .  .Sx \&Sx .
 .Ss \&St  .Ss \&St
 Replace an abbreviation for a standard with the full form.  Replace an abbreviation for a standard with the full form.
 The following standards are recognised:  The following standards are recognised.
   Where multiple lines are given without a blank line in between,
   they all refer to the same standard, and using the first form
   is recommended.
   .Bl -tag -width 1n
   .It C language standards
 .Pp  .Pp
 .Bl -tag -width "-p1003.1g-2000X" -compact  .Bl -tag -width "-p1003.1g-2000" -compact
 .It \-p1003.1-88  .It \-ansiC
 .St -p1003.1-88  .St -ansiC
 .It \-p1003.1-90  .It \-ansiC-89
 .St -p1003.1-90  .St -ansiC-89
 .It \-p1003.1-96  
 .St -p1003.1-96  
 .It \-p1003.1-2001  
 .St -p1003.1-2001  
 .It \-p1003.1-2004  
 .St -p1003.1-2004  
 .It \-p1003.1-2008  
 .St -p1003.1-2008  
 .It \-p1003.1  
 .St -p1003.1  
 .It \-p1003.1b  
 .St -p1003.1b  
 .It \-p1003.1b-93  
 .St -p1003.1b-93  
 .It \-p1003.1c-95  
 .St -p1003.1c-95  
 .It \-p1003.1g-2000  
 .St -p1003.1g-2000  
 .It \-p1003.1i-95  
 .St -p1003.1i-95  
 .It \-p1003.2-92  
 .St -p1003.2-92  
 .It \-p1003.2a-92  
 .St -p1003.2a-92  
 .It \-p1387.2-95  
 .St -p1387.2-95  
 .It \-p1003.2  
 .St -p1003.2  
 .It \-p1387.2  
 .St -p1387.2  
 .It \-isoC  .It \-isoC
 .St -isoC  .St -isoC
 .It \-isoC-90  .It \-isoC-90
 .St -isoC-90  .St -isoC-90
   .br
   The original C standard.
   .Pp
 .It \-isoC-amd1  .It \-isoC-amd1
 .St -isoC-amd1  .St -isoC-amd1
   .Pp
 .It \-isoC-tcor1  .It \-isoC-tcor1
 .St -isoC-tcor1  .St -isoC-tcor1
   .Pp
 .It \-isoC-tcor2  .It \-isoC-tcor2
 .St -isoC-tcor2  .St -isoC-tcor2
   .Pp
 .It \-isoC-99  .It \-isoC-99
 .St -isoC-99  .St -isoC-99
   .It \-ansiC-99
   .St -ansiC-99
   .br
   The second major version of the C language standard.
   .Pp
 .It \-isoC-2011  .It \-isoC-2011
 .St -isoC-2011  .St -isoC-2011
   .br
   The third major version of the C language standard.
   .El
   .It POSIX.1 before the Single UNIX Specification
   .Pp
   .Bl -tag -width "-p1003.1g-2000" -compact
   .It \-p1003.1-88
   .St -p1003.1-88
   .It \-p1003.1
   .St -p1003.1
   .br
   The original POSIX standard, based on ANSI C.
   .Pp
   .It \-p1003.1-90
   .St -p1003.1-90
 .It \-iso9945-1-90  .It \-iso9945-1-90
 .St -iso9945-1-90  .St -iso9945-1-90
   .br
   The first update of POSIX.1.
   .Pp
   .It \-p1003.1b-93
   .St -p1003.1b-93
   .It \-p1003.1b
   .St -p1003.1b
   .br
   Real-time extensions.
   .Pp
   .It \-p1003.1c-95
   .St -p1003.1c-95
   .br
   POSIX thread interfaces.
   .Pp
   .It \-p1003.1i-95
   .St -p1003.1i-95
   .br
   Technical Corrigendum.
   .Pp
   .It \-p1003.1-96
   .St -p1003.1-96
 .It \-iso9945-1-96  .It \-iso9945-1-96
 .St -iso9945-1-96  .St -iso9945-1-96
 .It \-iso9945-2-93  .br
 .St -iso9945-2-93  Includes POSIX.1-1990, 1b, 1c, and 1i.
 .It \-ansiC  .El
 .St -ansiC  .It X/Open Portability Guide version 4 and related standards
 .It \-ansiC-89  .Pp
 .St -ansiC-89  .Bl -tag -width "-p1003.1g-2000" -compact
 .It \-ansiC-99  
 .St -ansiC-99  
 .It \-ieee754  
 .St -ieee754  
 .It \-iso8802-3  
 .St -iso8802-3  
 .It \-iso8601  
 .St -iso8601  
 .It \-ieee1275-94  
 .St -ieee1275-94  
 .It \-xpg3  .It \-xpg3
 .St -xpg3  .St -xpg3
   .br
   An XPG4 precursor, published in 1989.
   .Pp
   .It \-p1003.2
   .St -p1003.2
   .It \-p1003.2-92
   .St -p1003.2-92
   .It \-iso9945-2-93
   .St -iso9945-2-93
   .br
   An XCU4 precursor.
   .Pp
   .It \-p1003.2a-92
   .St -p1003.2a-92
   .br
   Updates to POSIX.2.
   .Pp
 .It \-xpg4  .It \-xpg4
 .St -xpg4  .St -xpg4
   .br
   Based on POSIX.1 and POSIX.2, published in 1992.
   .El
   .It Single UNIX Specification version 1 and related standards
   .Pp
   .Bl -tag -width "-p1003.1g-2000" -compact
 .It \-xpg4.2  .It \-xpg4.2
 .St -xpg4.2  .St -xpg4.2
   .br
   This standard was published in 1994 and is also called SUSv1.
   It was used as the basis for UNIX 95 certification.
   The following three refer to parts of it.
   .Pp
   .It \-xsh4.2
   .St -xsh4.2
   .Pp
   .It \-xcurses4.2
   .St -xcurses4.2
   .Pp
   .It \-p1003.1g-2000
   .St -p1003.1g-2000
   .br
   Networking APIs, including sockets.
   .Pp
 .It \-xpg4.3  .It \-xpg4.3
 .St -xpg4.3  .St -xpg4.3
   .Pp
   .It \-svid4
   .St -svid4 ,
   .br
   Published in 1995.
   .El
   .It Single UNIX Specification version 2 and related standards
   .Pp
   .Bl -tag -width "-p1003.1g-2000" -compact
   .It \-susv2
   .St -susv2
   This Standard was published in 1997
   and is also called X/Open Portability Guide version 5.
   It was used as the basis for UNIX 98 certification.
   The following refer to parts of it.
   .Pp
 .It \-xbd5  .It \-xbd5
 .St -xbd5  .St -xbd5
 .It \-xcu5  .Pp
 .St -xcu5  
 .It \-xsh5  .It \-xsh5
 .St -xsh5  .St -xsh5
   .Pp
   .It \-xcu5
   .St -xcu5
   .Pp
 .It \-xns5  .It \-xns5
 .St -xns5  .St -xns5
 .It \-xns5.2  
 .St -xns5.2  
 .It \-xns5.2d2.0  .It \-xns5.2d2.0
 .St -xns5.2d2.0  .St -xns5.2d2.0
 .It \-xcurses4.2  .It \-xns5.2
 .St -xcurses4.2  .St -xns5.2
 .It \-susv2  .Pp
 .St -susv2  .It \-p1387.2
   .St -p1387.2
   .It \-p1387.2-95
   .St -p1387.2-95
   .br
   POSIX software administration.
   .El
   .It Single UNIX Specification version 3 and related standards
   .Pp
   .Bl -tag -width "-p1003.1g-2000X" -compact
   .It \-p1003.1d-99
   .St -p1003.1d-99
   .br
   Additional real-time extensions.
   .Pp
   .It \-p1003.1j-2000
   .St -p1003.1j-2000
   .br
   Advanced real-time extensions.
   .Pp
   .It \-p1003.1q-2000
   .St -p1003.1q-2000
   .br
   Amendment 7: Tracing [C Language].
   .Pp
   .It \-p1003.1-2001
   .St -p1003.1-2001
 .It \-susv3  .It \-susv3
 .St -susv3  .St -susv3
 .It \-svid4  .br
 .St -svid4  This standard is based on C99, SUSv2, POSIX.1-1996, 1d, and 1j.
   It is also called X/Open Portability Guide version 6.
   It is used as the basis for UNIX 03 certification.
   .Pp
   .It \-p1003.1-2004
   .St -p1003.1-2004
   .br
   The second and last Technical Corrigendum.
 .El  .El
   .It Single UNIX Specification version 4
   .Pp
   .Bl -tag -width "-p1003.1g-2000" -compact
   .It \-p1003.1-2008
   .St -p1003.1-2008
   .br
   This standard is also called SUSv4 and
   X/Open Portability Guide version 7.
   .Pp
   .It \-p1003.1-2013
   .St -p1003.1-2013
   .br
   This is the first Technical Corrigendum.
   .El
   .It Other standards
   .Pp
   .Bl -tag -width "-p1003.1g-2000" -compact
   .It \-ieee754
   .St -ieee754
   .br
   Floating-point arithmetic.
   .Pp
   .It \-iso8601
   .St -iso8601
   .br
   Representation of dates and times, published in 1988.
   .Pp
   .It \-iso8802-3
   .St -iso8802-3
   .br
   Ethernet local area networks.
   .Pp
   .It \-ieee1275-94
   .St -ieee1275-94
   .El
   .El
 .Ss \&Sx  .Ss \&Sx
 Reference a section or subsection in the same manual page.  Reference a section or subsection in the same manual page.
 The referenced section or subsection name must be identical to the  The referenced section or subsection name must be identical to the
Line 2467  Examples:
Line 2641  Examples:
 Prints out  Prints out
 .Dq currently under development.  .Dq currently under development.
 .Ss \&Ux  .Ss \&Ux
 Format the UNIX name.  Format the
   .Ux
   name.
 Accepts no argument.  Accepts no argument.
 .Pp  .Pp
 Examples:  Examples:
Line 2532  Link to another manual
Line 2708  Link to another manual
 .Pq Qq cross-reference .  .Pq Qq cross-reference .
 Its syntax is as follows:  Its syntax is as follows:
 .Pp  .Pp
 .D1 Pf \. Sx \&Xr Ar name section  .D1 Pf \. Sx \&Xr Ar name Op section
 .Pp  .Pp
 The  Cross reference the
 .Ar name  .Ar name
 and  and
 .Ar section  .Ar section
 are the name and section of the linked manual.  number of another man page;
 If  omitting the section number is rarely useful.
 .Ar section  
 is followed by non-punctuation, an  
 .Sx \&Ns  
 is inserted into the token stream.  
 This behaviour is for compatibility with  
 GNU troff.  
 .Pp  .Pp
 Examples:  Examples:
 .Dl \&.Xr mandoc 1  .Dl \&.Xr mandoc 1
Line 2964  Manually switching the font using the
Line 3134  Manually switching the font using the
 .Ql \ef  .Ql \ef
 font escape sequences is never required.  font escape sequences is never required.
 .Sh COMPATIBILITY  .Sh COMPATIBILITY
 This section documents compatibility between mandoc and other other  This section documents compatibility between mandoc and other
 troff implementations, at this time limited to GNU troff  troff implementations, at this time limited to GNU troff
 .Pq Qq groff .  .Pq Qq groff .
 The term  The term
Line 3109  The following features are unimplemented in mandoc:
Line 3279  The following features are unimplemented in mandoc:
 .Fl file Ar file .  .Fl file Ar file .
 .It  .It
 .Sx \&Bd  .Sx \&Bd
 .Fl offset Ar center  .Fl offset Cm center
 and  and
 .Fl offset Ar right .  .Fl offset Cm right .
 Groff does not implement centred and flush-right rendering either,  Groff does not implement centred and flush-right rendering either,
 but produces large indentations.  but produces large indentations.
 .It  .It
Line 3168  utility written by Kristaps Dzonsons appeared in
Line 3338  utility written by Kristaps Dzonsons appeared in
 The  The
 .Nm  .Nm
 reference was written by  reference was written by
 .An Kristaps Dzonsons ,  .An Kristaps Dzonsons Aq Mt kristaps@bsd.lv .
 .Mt kristaps@bsd.lv .  
Legend:
Removed from v.1.215  
changed lines
  Added in v.1.227
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