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+.TH MAN 6
+.SH NAME
+man \- manual page format
+.SH DESCRIPTION
+The Inferno manual pages are stored as text files in a format originally defined for use with the Unix and Plan 9
+.I troff
+command, when used with the
+.I man
+macro package.
+Within Inferno, the format is interpreted by the programs of
+.IR man (1).
+.PP
+Except in
+.L .LR
+and
+.L .RL
+requests, any text argument denoted
+.I t
+in the request summary may be zero to six words.
+Quotes
+\fL"\fP ... \fL"\fP
+may be used to include blanks in a `word'.
+If
+.I t
+is empty,
+the special treatment is applied to
+the next text input line (the next line that doesn't begin with dot).
+In this way, for example,
+.B .I
+may be used to italicize a line of more than 6 words, or
+.B .SM
+followed by
+.B .B
+to make small letters in `bold' font.
+.PP
+A prevailing indent distance is remembered between
+successive indented paragraphs,
+and is reset to default value upon reaching a non-indented paragraph.
+Default units for indents
+.I i
+are ens.
+.PP
+The fonts are
+.TP
+.B R
+roman, the main font, preferred for diagnostics
+.PD 0
+.TP
+.B I
+italic, preferred for parameters, short names of commands,
+names of manual pages,
+and naked function names
+.TP
+.B B
+`bold', actually the constant width font,
+preferred for examples, file names, declarations, keywords, names of
+.B struct
+members, and literals
+(numbers are rarely literals)
+.TP
+.B L
+also the constant width font.
+For graphical display and printing,
+.BR L = B ;
+when converted to plain text, the
+arguments of the macros
+.BR .L ,
+.BR .LR ,
+and
+.B .RL
+are printed in quotes;
+preferred only where quotes really help (e.g. lower-case literals and
+punctuation).
+.PD
+.LP
+Type font and size are reset to default values
+before each paragraph, and after processing
+font- or size-setting macros.
+.PP
+The
+.I man
+format
+admits equations and tables in the style of Unix
+.I eqn
+(equation setting)
+and
+.I tbl
+(table layout)
+preprocessors,
+but do not support arguments on
+.B .EQ
+and
+.B .TS
+macros.
+.PP
+These strings are predefined by
+.IR man :
+.TP
+.B \e*R
+Trademark symbol
+.br
+.ns
+.TP
+.B \e*S
+Change to default type size.
+.SH FILES
+.TF /man/1/INDEX
+.TP
+.B /man/*/*
+Source files of manual pages.
+.SH SEE ALSO
+.IR man (1)
+.SH REQUESTS
+.ta \w'.TH n c x 'u +\w'Cause 'u +\w'Argument\ 'u
+.if 1 .di xx
+.if 1 			\ka
+.if 1 .br
+.if 1 .di
+.if 1 .in \nau
+.ti0
+Request	Cause	If no	Explanation
+.ti0
+	Break	Argument
+.ti0
+\&\fL.B\fR \fIt\fR	no	\fIt\fR=n.t.l.*	Text
+.I t
+is `bold'.
+.ti0
+\&\fL.BI\fR \fIt\fR	no	\fIt\fR=n.t.l.	Join
+words of
+.I t
+alternating bold and italic.
+.ti0
+\&\fL.BR\fR \fIt\fR	no	\fIt\fR=n.t.l.	Join
+words of
+.I t
+alternating bold and Roman.
+.ti0
+\&\fL.DT\fR	no		Restore default tabs.
+.ti0
+\&\fL.EE\fR	yes		End displayed example
+.ti0
+\&\fL.EX\fR	yes		Begin displayed example
+.ti0
+\&\fL.HP\fR \fIi\fR	yes	\fIi\fR=p.i.*	Set prevailing indent to
+.IR i .
+Begin paragraph with hanging indent.
+.ti0
+\&\fL.I\fR \fIt\fR	no	\fIt\fR=n.t.l.	Text
+.I t
+is italic.
+.ti0
+\&\fL.IB\fR \fIt\fR	no	\fIt\fR=n.t.l.	Join
+words of
+.I t
+alternating italic and bold.
+.ti0
+\&\fL.IP\fR \fIx i\fR	yes	\fIx\fR=""	Same as \fL.TP\fP with tag
+.IR x .
+.ti0
+\&\fL.IR\fR \fIt\fR	no	\fIt\fR=n.t.l.	Join
+words of
+.I t
+alternating italic and Roman.
+.ti0
+\&\fL.L\fR \fIt\fR	no	\fIt\fR=n.t.l.	Text
+.I t
+is literal.
+.ti0
+\&\fL.LP\fR	yes		Same as \fL.PP\fP.
+.ti0
+\&\fL.LR\fR \fIt\fR	no		Join 2
+words of
+.I t
+alternating literal and Roman.
+.ti0
+\&\fL.PD\fR \fId\fR	no	\fId\fR=\fL.4v\fP	Interparagraph distance is
+.IR d .
+.ti0
+\&\fL.PP\fR	yes		Begin paragraph.
+Set prevailing indent to default.
+.ti0
+\&\fL.RE\fR	yes		End of relative indent.
+Set prevailing indent to amount of starting \fL.RS\fP.
+.ti0
+\&\fL.RI\fR \fIt\fR	no	\fIt\fR=n.t.l.	Join
+words of
+.I t
+alternating Roman and italic.
+.ti0
+\&\fL.RL\fR \fIt\fR	no		Join 2 or 3
+words of
+.I t
+alternating Roman and literal.
+.ti0
+\&\fL.RS\fR \fIi\fR	yes	\fIi\fR=p.i.	Start relative indent,
+move left margin in distance
+.IR i .
+Set prevailing indent to default for nested indents.
+.ti0
+\&\fL.SH\fR \fIt\fR	yes	\fIt\fR=""	Subhead; reset paragraph distance.
+.ti0
+\&\fL.SM\fR \fIt\fR	no	\fIt\fR=n.t.l.	Text
+.I t
+is small.
+.ti0
+\&\fL.SS\fR \fIt\fR	no	\fIt\fR=""	Secondary subhead.
+.ti0
+\&\fL.TF\fR \fIs\fR	yes		Prevailing indent is wide as
+string
+.I s
+in font 
+.BR L ;
+paragraph distance is 0.
+.ti0
+\&\fL.TH\fR \fIn c x\fR	yes		Begin page named
+.I n
+of chapter
+.IR c;
+.I x
+is extra commentary, e.g. `local', for page head.
+Set prevailing indent and tabs to default.
+.ti0
+\&\fL.TP\fR \fIi\fR	yes	\fIi\fR=p.i.	Set prevailing indent to
+.IR i .
+Restore default indent if
+.IR i =0.
+Begin indented paragraph
+with hanging tag given by next text line.
+If tag doesn't fit, place it on separate line.
+.ti0
+\&\fL.1C\fR	yes		Equalize columns and return to 1-column output
+.ti0
+\&\fL.2C\fR	yes		Start 2-column nofill output
+.PP
+.ti0
+* n.t.l. = next text line; p.i. = prevailing indent
+.SH BUGS
+There's no way to include literal double quote marks
+.B \&"
+in font-alternation macros, such as
+.LR .BI .
+.br
+There is no direct way to suppress column widows in 2-column
+output; the column lengths may be adjusted by inserting
+.L .sp
+requests before the closing
+.LR .1C .