Annotation of src/usr.bin/mandoc/mandoc.1, Revision 1.53
1.53 ! schwarze 1: .\" $OpenBSD: mandoc.1,v 1.52 2011/11/13 14:38:57 jmc Exp $
1.1 kristaps 2: .\"
1.44 schwarze 3: .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 4: .\"
5: .\" Permission to use, copy, modify, and distribute this software for any
1.3 schwarze 6: .\" purpose with or without fee is hereby granted, provided that the above
7: .\" copyright notice and this permission notice appear in all copies.
1.1 kristaps 8: .\"
1.3 schwarze 9: .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 16: .\"
1.52 jmc 17: .Dd $Mdocdate: November 13 2011 $
1.2 deraadt 18: .Dt MANDOC 1
1.1 kristaps 19: .Os
20: .Sh NAME
21: .Nm mandoc
22: .Nd format and display UNIX manuals
23: .Sh SYNOPSIS
24: .Nm mandoc
1.26 jmc 25: .Op Fl V
1.1 kristaps 26: .Op Fl m Ns Ar format
1.26 jmc 27: .Op Fl O Ns Ar option
1.17 schwarze 28: .Op Fl T Ns Ar output
1.38 schwarze 29: .Op Fl W Ns Ar level
1.45 schwarze 30: .Op Ar
1.1 kristaps 31: .Sh DESCRIPTION
32: The
33: .Nm
1.10 schwarze 34: utility formats
1.1 kristaps 35: .Ux
1.25 jmc 36: manual pages for display.
1.53 ! schwarze 37: .Pp
! 38: By default,
! 39: .Nm
! 40: reads
! 41: .Xr mdoc 7
! 42: or
! 43: .Xr man 7
! 44: text from stdin, implying
! 45: .Fl m Ns Cm andoc ,
! 46: and produces
! 47: .Fl T Ns Cm ascii
! 48: output.
! 49: .Pp
1.25 jmc 50: The arguments are as follows:
1.5 schwarze 51: .Bl -tag -width Ds
1.1 kristaps 52: .It Fl m Ns Ar format
1.25 jmc 53: Input format.
54: See
1.1 kristaps 55: .Sx Input Formats
1.25 jmc 56: for available formats.
57: Defaults to
1.26 jmc 58: .Fl m Ns Cm andoc .
59: .It Fl O Ns Ar option
1.25 jmc 60: Comma-separated output options.
1.1 kristaps 61: .It Fl T Ns Ar output
1.25 jmc 62: Output format.
63: See
1.1 kristaps 64: .Sx Output Formats
1.25 jmc 65: for available formats.
66: Defaults to
1.26 jmc 67: .Fl T Ns Cm ascii .
1.4 schwarze 68: .It Fl V
69: Print version and exit.
1.38 schwarze 70: .It Fl W Ns Ar level
71: Specify the minimum message
72: .Ar level
73: to be reported on the standard error output and to affect the exit status.
74: The
75: .Ar level
76: can be
77: .Cm warning ,
78: .Cm error ,
79: or
80: .Cm fatal .
81: The default is
82: .Fl W Ns Cm fatal ;
1.26 jmc 83: .Fl W Ns Cm all
1.38 schwarze 84: is an alias for
85: .Fl W Ns Cm warning .
86: See
87: .Sx EXIT STATUS
88: and
89: .Sx DIAGNOSTICS
90: for details.
91: .Pp
92: The special option
93: .Fl W Ns Cm stop
94: tells
95: .Nm
96: to exit after parsing a file that causes warnings or errors of at least
97: the requested level.
98: No formatted output will be produced from that file.
99: If both a
100: .Ar level
101: and
102: .Cm stop
103: are requested, they can be joined with a comma, for example
104: .Fl W Ns Cm error , Ns Cm stop .
1.26 jmc 105: .It Ar file
106: Read input from zero or more files.
1.25 jmc 107: If unspecified, reads from stdin.
108: If multiple files are specified,
1.1 kristaps 109: .Nm
110: will halt with the first failed parse.
111: .El
112: .Ss Input Formats
113: The
114: .Nm
115: utility accepts
116: .Xr mdoc 7
117: and
118: .Xr man 7
119: input with
1.26 jmc 120: .Fl m Ns Cm doc
1.1 kristaps 121: and
1.26 jmc 122: .Fl m Ns Cm an ,
1.25 jmc 123: respectively.
124: The
1.1 kristaps 125: .Xr mdoc 7
126: format is
127: .Em strongly
1.10 schwarze 128: recommended;
1.1 kristaps 129: .Xr man 7
130: should only be used for legacy manuals.
131: .Pp
132: A third option,
1.26 jmc 133: .Fl m Ns Cm andoc ,
1.1 kristaps 134: which is also the default, determines encoding on-the-fly: if the first
1.10 schwarze 135: non-comment macro is
1.11 schwarze 136: .Sq \&Dd
1.1 kristaps 137: or
1.11 schwarze 138: .Sq \&Dt ,
1.10 schwarze 139: the
1.1 kristaps 140: .Xr mdoc 7
141: parser is used; otherwise, the
142: .Xr man 7
143: parser is used.
144: .Pp
145: If multiple
1.10 schwarze 146: files are specified with
1.26 jmc 147: .Fl m Ns Cm andoc ,
1.25 jmc 148: each has its file-type determined this way.
149: If multiple files are
1.1 kristaps 150: specified and
1.26 jmc 151: .Fl m Ns Cm doc
1.1 kristaps 152: or
1.26 jmc 153: .Fl m Ns Cm an
1.1 kristaps 154: is specified, then this format is used exclusively.
155: .Ss Output Formats
156: The
157: .Nm
158: utility accepts the following
159: .Fl T
1.34 schwarze 160: arguments, which correspond to output modes:
1.48 jmc 161: .Bl -tag -width "-Tlocale"
1.26 jmc 162: .It Fl T Ns Cm ascii
1.42 schwarze 163: Produce 7-bit ASCII output.
1.25 jmc 164: This is the default.
165: See
1.20 schwarze 166: .Sx ASCII Output .
1.26 jmc 167: .It Fl T Ns Cm html
1.42 schwarze 168: Produce strict CSS1/HTML-4.01 output.
1.25 jmc 169: See
1.20 schwarze 170: .Sx HTML Output .
1.26 jmc 171: .It Fl T Ns Cm lint
172: Parse only: produce no output.
173: Implies
1.38 schwarze 174: .Fl W Ns Cm warning .
1.48 jmc 175: .It Fl T Ns Cm locale
176: Encode output using the current locale.
177: See
178: .Sx Locale Output .
1.46 schwarze 179: .It Fl T Ns Cm man
1.49 schwarze 180: Produce
1.46 schwarze 181: .Xr man 7
1.49 schwarze 182: format output.
183: See
184: .Sx Man Output .
1.36 schwarze 185: .It Fl T Ns Cm pdf
186: Produce PDF output.
187: See
188: .Sx PDF Output .
1.31 schwarze 189: .It Fl T Ns Cm ps
190: Produce PostScript output.
191: See
192: .Sx PostScript Output .
1.26 jmc 193: .It Fl T Ns Cm tree
194: Produce an indented parse tree.
1.48 jmc 195: .It Fl T Ns Cm utf8
196: Encode output in the UTF\-8 multi-byte format.
197: See
198: .Sx UTF\-8 Output .
1.26 jmc 199: .It Fl T Ns Cm xhtml
1.42 schwarze 200: Produce strict CSS1/XHTML-1.0 output.
1.25 jmc 201: See
1.21 schwarze 202: .Sx XHTML Output .
1.1 kristaps 203: .El
204: .Pp
205: If multiple input files are specified, these will be processed by the
206: corresponding filter in-order.
1.34 schwarze 207: .Ss ASCII Output
208: Output produced by
209: .Fl T Ns Cm ascii ,
210: which is the default, is rendered in standard 7-bit ASCII documented in
211: .Xr ascii 7 .
212: .Pp
213: Font styles are applied by using back-spaced encoding such that an
214: underlined character
215: .Sq c
216: is rendered as
217: .Sq _ Ns \e[bs] Ns c ,
218: where
219: .Sq \e[bs]
220: is the back-space character number 8.
221: Emboldened characters are rendered as
222: .Sq c Ns \e[bs] Ns c .
223: .Pp
224: The special characters documented in
225: .Xr mandoc_char 7
226: are rendered best-effort in an ASCII equivalent.
1.44 schwarze 227: If no equivalent is found,
228: .Sq \&?
229: is used instead.
1.34 schwarze 230: .Pp
231: Output width is limited to 78 visible columns unless literal input lines
232: exceed this limit.
233: .Pp
234: The following
235: .Fl O
236: arguments are accepted:
1.5 schwarze 237: .Bl -tag -width Ds
1.51 schwarze 238: .It Cm indent Ns = Ns Ar indent
239: The left margin for normal text is set to
240: .Ar indent
241: blank characters instead of the default of five for
242: .Xr mdoc 7
243: and seven for
244: .Xr man 7 .
245: Increasing this is not recommended; it may result in degraded formatting,
1.52 jmc 246: for example overfull lines or ugly line breaks.
1.34 schwarze 247: .It Cm width Ns = Ns Ar width
248: The output width is set to
249: .Ar width ,
250: which will normalise to \(>=60.
1.1 kristaps 251: .El
1.34 schwarze 252: .Ss HTML Output
253: Output produced by
254: .Fl T Ns Cm html
255: conforms to HTML-4.01 strict.
256: .Pp
1.30 schwarze 257: The
1.34 schwarze 258: .Pa example.style.css
1.42 schwarze 259: file documents style-sheet classes available for customising output.
260: If a style-sheet is not specified with
261: .Fl O Ns Ar style ,
262: .Fl T Ns Cm html
263: defaults to simple output readable in any graphical or text-based web
264: browser.
1.34 schwarze 265: .Pp
1.45 schwarze 266: Special characters are rendered in decimal-encoded UTF\-8.
1.34 schwarze 267: .Pp
268: The following
1.33 schwarze 269: .Fl O
1.34 schwarze 270: arguments are accepted:
1.17 schwarze 271: .Bl -tag -width Ds
1.49 schwarze 272: .It Cm fragment
1.50 schwarze 273: Omit the
274: .Aq !DOCTYPE
275: declaration and the
276: .Aq html ,
277: .Aq head ,
278: and
279: .Aq body
280: elements and only emit the subtree below the
281: .Aq body
282: element.
1.49 schwarze 283: The
284: .Cm style
1.50 schwarze 285: argument will be ignored.
1.49 schwarze 286: This is useful when embedding manual content within existing documents.
1.33 schwarze 287: .It Cm includes Ns = Ns Ar fmt
1.17 schwarze 288: The string
289: .Ar fmt ,
1.21 schwarze 290: for example,
1.17 schwarze 291: .Ar ../src/%I.html ,
292: is used as a template for linked header files (usually via the
293: .Sq \&In
1.25 jmc 294: macro).
295: Instances of
1.17 schwarze 296: .Sq \&%I
1.25 jmc 297: are replaced with the include filename.
298: The default is not to present a
1.17 schwarze 299: hyperlink.
1.33 schwarze 300: .It Cm man Ns = Ns Ar fmt
1.17 schwarze 301: The string
302: .Ar fmt ,
1.21 schwarze 303: for example,
1.17 schwarze 304: .Ar ../html%S/%N.%S.html ,
305: is used as a template for linked manuals (usually via the
306: .Sq \&Xr
1.25 jmc 307: macro).
308: Instances of
1.17 schwarze 309: .Sq \&%N
310: and
311: .Sq %S
312: are replaced with the linked manual's name and section, respectively.
1.25 jmc 313: If no section is included, section 1 is assumed.
314: The default is not to
1.17 schwarze 315: present a hyperlink.
1.33 schwarze 316: .It Cm style Ns = Ns Ar style.css
1.26 jmc 317: The file
318: .Ar style.css
319: is used for an external style-sheet.
320: This must be a valid absolute or
321: relative URI.
1.30 schwarze 322: .El
1.48 jmc 323: .Ss Locale Output
324: Locale-depending output encoding is triggered with
325: .Fl T Ns Cm locale .
326: This option is not available on all systems: systems without locale
327: support, or those whose internal representation is not natively UCS-4,
328: will fall back to
329: .Fl T Ns Cm ascii .
330: See
331: .Sx ASCII Output
332: for font style specification and available command-line arguments.
1.49 schwarze 333: .Ss Man Output
334: Translate input format into
335: .Xr man 7
336: output format.
337: This is useful for distributing manual sources to legancy systems
338: lacking
339: .Xr mdoc 7
340: formatters.
341: .Pp
342: If
343: .Xr mdoc 7
344: is passed as input, it is translated into
1.50 schwarze 345: .Xr man 7 .
346: If the input format is
1.49 schwarze 347: .Xr man 7 ,
1.50 schwarze 348: the input is copied to the output, expanding any
1.49 schwarze 349: .Xr roff 7
350: .Sq so
1.50 schwarze 351: requests.
352: The parser is also run, and as usual, the
353: .Fl W
354: level controls which
355: .Sx DIAGNOSTICS
356: are displayed before copying the input to the output.
1.48 jmc 357: .Ss PDF Output
358: PDF-1.1 output may be generated by
359: .Fl T Ns Cm pdf .
360: See
361: .Sx PostScript Output
362: for
363: .Fl O
364: arguments and defaults.
1.31 schwarze 365: .Ss PostScript Output
1.33 schwarze 366: PostScript
367: .Qq Adobe-3.0
368: Level-2 pages may be generated by
1.31 schwarze 369: .Fl T Ns Cm ps .
1.35 schwarze 370: Output pages default to letter sized and are rendered in the Times font
371: family, 11-point.
372: Margins are calculated as 1/9 the page length and width.
373: Line-height is 1.4m.
1.34 schwarze 374: .Pp
375: Special characters are rendered as in
376: .Sx ASCII Output .
377: .Pp
378: The following
379: .Fl O
380: arguments are accepted:
381: .Bl -tag -width Ds
382: .It Cm paper Ns = Ns Ar name
383: The paper size
384: .Ar name
385: may be one of
1.35 schwarze 386: .Ar a3 ,
387: .Ar a4 ,
388: .Ar a5 ,
389: .Ar legal ,
1.34 schwarze 390: or
391: .Ar letter .
1.35 schwarze 392: You may also manually specify dimensions as
393: .Ar NNxNN ,
394: width by height in millimetres.
395: If an unknown value is encountered,
396: .Ar letter
397: is used.
1.34 schwarze 398: .El
1.48 jmc 399: .Ss UTF\-8 Output
400: Use
401: .Fl T Ns Cm utf8
402: to force a UTF\-8 locale.
1.36 schwarze 403: See
1.48 jmc 404: .Sx Locale Output
405: for details and options.
1.21 schwarze 406: .Ss XHTML Output
407: Output produced by
1.26 jmc 408: .Fl T Ns Cm xhtml
1.21 schwarze 409: conforms to XHTML-1.0 strict.
410: .Pp
411: See
412: .Sx HTML Output
413: for details; beyond generating XHTML tags instead of HTML tags, these
414: output modes are identical.
1.38 schwarze 415: .Sh EXIT STATUS
416: The
417: .Nm
418: utility exits with one of the following values, controlled by the message
419: .Ar level
420: associated with the
421: .Fl W
422: option:
423: .Pp
424: .Bl -tag -width Ds -compact
425: .It 0
426: No warnings or errors occurred, or those that did were ignored because
427: they were lower than the requested
428: .Ar level .
429: .It 2
430: At least one warning occurred, but no error, and
431: .Fl W Ns Cm warning
432: was specified.
433: .It 3
434: At least one parsing error occurred, but no fatal error, and
435: .Fl W Ns Cm error
436: or
437: .Fl W Ns Cm warning
438: was specified.
439: .It 4
440: A fatal parsing error occurred.
441: .It 5
442: Invalid command line arguments were specified.
443: No input files have been read.
444: .It 6
445: An operating system error occurred, for example memory exhaustion or an
446: error accessing input files.
447: Such errors cause
448: .Nm
449: to exit at once, possibly in the middle of parsing or formatting a file.
450: .El
451: .Pp
452: Note that selecting
453: .Fl T Ns Cm lint
454: output mode implies
455: .Fl W Ns Cm warning .
1.1 kristaps 456: .Sh EXAMPLES
457: To page manuals to the terminal:
458: .Pp
1.42 schwarze 459: .Dl $ mandoc \-Wall,stop mandoc.1 2\*(Gt&1 | less
460: .Dl $ mandoc mandoc.1 mdoc.3 mdoc.7 | less
1.12 schwarze 461: .Pp
1.17 schwarze 462: To produce HTML manuals with
463: .Ar style.css
464: as the style-sheet:
465: .Pp
1.42 schwarze 466: .Dl $ mandoc \-Thtml -Ostyle=style.css mdoc.7 \*(Gt mdoc.7.html
1.17 schwarze 467: .Pp
1.12 schwarze 468: To check over a large set of manuals:
469: .Pp
1.38 schwarze 470: .Dl $ mandoc \-Tlint `find /usr/src -name \e*\e.[1-9]`
1.34 schwarze 471: .Pp
472: To produce a series of PostScript manuals for A4 paper:
473: .Pp
1.42 schwarze 474: .Dl $ mandoc \-Tps \-Opaper=a4 mdoc.7 man.7 \*(Gt manuals.ps
1.46 schwarze 475: .Pp
476: Convert a modern
477: .Xr mdoc 7
478: manual to the older
479: .Xr man 7
480: format, for use on systems lacking an
481: .Xr mdoc 7
482: parser:
483: .Pp
484: .Dl $ mandoc \-Tman foo.mdoc \*(Gt foo.man
1.38 schwarze 485: .Sh DIAGNOSTICS
486: Standard error messages reporting parsing errors are prefixed by
487: .Pp
488: .Sm off
489: .D1 Ar file : line : column : \ level :
490: .Sm on
491: .Pp
492: where the fields have the following meanings:
493: .Bl -tag -width "column"
494: .It Ar file
495: The name of the input file causing the message.
496: .It Ar line
497: The line number in that input file.
498: Line numbering starts at 1.
499: .It Ar column
500: The column number in that input file.
501: Column numbering starts at 1.
502: If the issue is caused by a word, the column number usually
503: points to the first character of the word.
504: .It Ar level
505: The message level, printed in capital letters.
506: .El
507: .Pp
508: Message levels have the following meanings:
509: .Bl -tag -width "warning"
510: .It Cm fatal
511: The parser is unable to parse a given input file at all.
512: No formatted output is produced from that input file.
513: .It Cm error
514: An input file contains syntax that cannot be safely interpreted,
515: either because it is invalid or because
516: .Nm
517: does not implement it yet.
518: By discarding part of the input or inserting missing tokens,
519: the parser is able to continue, and the error does not prevent
520: generation of formatted output, but typically, preparing that
521: output involves information loss, broken document structure
522: or unintended formatting.
523: .It Cm warning
524: An input file uses obsolete, discouraged or non-portable syntax.
525: All the same, the meaning of the input is unambiguous and a correct
526: rendering can be produced.
527: Documents causing warnings may render poorly when using other
528: formatting tools instead of
529: .Nm .
530: .El
531: .Pp
532: Messages of the
533: .Cm warning
534: and
535: .Cm error
536: levels are hidden unless their level, or a lower level, is requested using a
537: .Fl W
538: option or
539: .Fl T Ns Cm lint
540: output mode.
541: .Pp
542: The
543: .Nm
544: utility may also print messages related to invalid command line arguments
545: or operating system errors, for example when memory is exhausted or
1.40 jmc 546: input files cannot be read.
547: Such messages do not carry the prefix described above.
1.6 schwarze 548: .Sh COMPATIBILITY
1.10 schwarze 549: This section summarises
1.6 schwarze 550: .Nm
1.39 schwarze 551: compatibility with GNU troff.
1.14 schwarze 552: Each input and output format is separately noted.
1.20 schwarze 553: .Ss ASCII Compatibility
1.6 schwarze 554: .Bl -bullet -compact
1.13 schwarze 555: .It
1.44 schwarze 556: Unrenderable unicode codepoints specified with
557: .Sq \e[uNNNN]
558: escapes are printed as
559: .Sq \&?
560: in mandoc.
561: In GNU troff, these raise an error.
562: .It
1.21 schwarze 563: The
1.14 schwarze 564: .Sq \&Bd \-literal
1.21 schwarze 565: and
1.14 schwarze 566: .Sq \&Bd \-unfilled
567: macros of
568: .Xr mdoc 7
569: in
1.26 jmc 570: .Fl T Ns Cm ascii
1.14 schwarze 571: are synonyms, as are \-filled and \-ragged.
572: .It
1.44 schwarze 573: In historic GNU troff, the
1.14 schwarze 574: .Sq \&Pa
575: .Xr mdoc 7
576: macro does not underline when scoped under an
577: .Sq \&It
1.25 jmc 578: in the FILES section.
579: This behaves correctly in
1.14 schwarze 580: .Nm .
1.10 schwarze 581: .It
1.26 jmc 582: A list or display following the
1.11 schwarze 583: .Sq \&Ss
1.14 schwarze 584: .Xr mdoc 7
585: macro in
1.26 jmc 586: .Fl T Ns Cm ascii
1.6 schwarze 587: does not assert a prior vertical break, just as it doesn't with
1.11 schwarze 588: .Sq \&Sh .
1.6 schwarze 589: .It
1.14 schwarze 590: The
591: .Sq \&na
592: .Xr man 7
1.16 schwarze 593: macro in
1.26 jmc 594: .Fl T Ns Cm ascii
1.16 schwarze 595: has no effect.
1.6 schwarze 596: .It
597: Words aren't hyphenated.
598: .El
1.21 schwarze 599: .Ss HTML/XHTML Compatibility
1.17 schwarze 600: .Bl -bullet -compact
601: .It
602: The
1.20 schwarze 603: .Sq \efP
604: escape will revert the font to the previous
605: .Sq \ef
606: escape, not to the last rendered decoration, which is now dictated by
1.25 jmc 607: CSS instead of hard-coded.
608: It also will not span past the current scope,
609: for the same reason.
610: Note that in
1.20 schwarze 611: .Sx ASCII Output
612: mode, this will work fine.
613: .It
614: The
1.17 schwarze 615: .Xr mdoc 7
616: .Sq \&Bl \-hang
617: and
618: .Sq \&Bl \-tag
619: list types render similarly (no break following overreached left-hand
620: side) due to the expressive constraints of HTML.
621: .It
622: The
623: .Xr man 7
624: .Sq IP
625: and
626: .Sq TP
627: lists render similarly.
628: .El
1.1 kristaps 629: .Sh SEE ALSO
1.47 schwarze 630: .Xr eqn 7 ,
1.25 jmc 631: .Xr man 7 ,
1.1 kristaps 632: .Xr mandoc_char 7 ,
1.43 schwarze 633: .Xr mdoc 7 ,
634: .Xr roff 7 ,
635: .Xr tbl 7
1.1 kristaps 636: .Sh AUTHORS
637: The
638: .Nm
1.10 schwarze 639: utility was written by
1.47 schwarze 640: .An Kristaps Dzonsons ,
641: .Mt kristaps@bsd.lv .
1.17 schwarze 642: .Sh CAVEATS
643: In
1.26 jmc 644: .Fl T Ns Cm html
1.21 schwarze 645: and
1.26 jmc 646: .Fl T Ns Cm xhtml ,
1.17 schwarze 647: the maximum size of an element attribute is determined by
648: .Dv BUFSIZ ,
1.25 jmc 649: which is usually 1024 bytes.
650: Be aware of this when setting long link
1.26 jmc 651: formats such as
652: .Fl O Ns Cm style Ns = Ns Ar really/long/link .
1.22 schwarze 653: .Pp
654: Nesting elements within next-line element scopes of
1.26 jmc 655: .Fl m Ns Cm an ,
1.22 schwarze 656: such as
657: .Sq br
658: within an empty
659: .Sq B ,
660: will confuse
1.26 jmc 661: .Fl T Ns Cm html
1.22 schwarze 662: and
1.26 jmc 663: .Fl T Ns Cm xhtml
1.23 schwarze 664: and cause them to forget the formatting of the prior next-line scope.
665: .Pp
1.24 schwarze 666: The
667: .Sq \(aq
668: control character is an alias for the standard macro control character
669: and does not emit a line-break as stipulated in GNU troff.
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