===================================================================
RCS file: /cvs/mandoc/roff.7,v
retrieving revision 1.33
retrieving revision 1.41
diff -u -p -r1.33 -r1.41
--- mandoc/roff.7	2011/09/26 23:07:31	1.33
+++ mandoc/roff.7	2013/07/13 19:41:16	1.41
@@ -1,4 +1,4 @@
-.\"	$Id: roff.7,v 1.33 2011/09/26 23:07:31 schwarze Exp $
+.\"	$Id: roff.7,v 1.41 2013/07/13 19:41:16 schwarze Exp $
 .\"
 .\" Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011 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.
 .\"
-.Dd $Mdocdate: September 26 2011 $
+.Dd $Mdocdate: July 13 2013 $
 .Dt ROFF 7
 .Os
 .Sh NAME
@@ -83,7 +83,7 @@ depends on the respective processing context.
 .Nm
 documents may contain only graphable 7-bit ASCII characters, the space
 character, and, in certain circumstances, the tab character.
-The back-space character
+The backslash character
 .Sq \e
 indicates the start of an escape sequence for
 .Sx Comments ,
@@ -143,6 +143,8 @@ escape followed by an indicator: B (bold), I (italic),
 (revert to previous mode).
 A numerical representation 3, 2, or 1 (bold, italic, and regular,
 respectively) may be used instead.
+The indicator or numerical representative may be preceded by C
+(constant-width), which is ignored.
 .Pp
 Examples:
 .Bl -tag -width Ds -offset indent -compact
@@ -415,6 +417,18 @@ The syntax of this request is the same as that of
 It is currently ignored by
 .Xr mandoc 1 ,
 as are its children.
+.Ss \&cc
+Changes the control character.
+Its syntax is as follows:
+.Bd -literal -offset indent
+.Pf . Cm \&cc Op Ar c
+.Ed
+.Pp
+If
+.Ar c
+is not specified, the control character is reset to
+.Sq \&. .
+Trailing characters are ignored.
 .Ss \&de
 Define a
 .Nm
@@ -842,6 +856,22 @@ only accepts relative paths not containing the strings
 .Qq ../
 and
 .Qq /.. .
+.Pp
+This request requires
+.Xr man 1
+to change to the right directory before calling
+.Xr mandoc 1 ,
+per convention to the root of the manual tree.
+Typical usage looks like:
+.Pp
+.Dl \&.so man3/Xcursor.3
+.Pp
+As the whole concept is rather fragile, the use of
+.Sx \&so
+is discouraged.
+Use
+.Xr ln 1
+instead.
 .Ss \&ta
 Set tab stops.
 This line-scoped request can take an arbitrary number of arguments.
@@ -878,7 +908,7 @@ See
 .Xr tbl 7
 for a description of the tbl language.
 .Sh COMPATIBILITY
-This section documents compatibility between mandoc and other other
+This section documents compatibility between mandoc and other
 .Nm
 implementations, at this time limited to GNU troff
 .Pq Qq groff .
@@ -943,21 +973,27 @@ using the next-line syntax.
 .%U http://heirloom.sourceforge.net/doctools/troff.pdf
 .Re
 .Sh HISTORY
-The RUNOFF typesetting system was written in PL/1 for the CTSS
-operating system by Jerome ("Jerry") E. Saltzer in 1961.
-It was first used as the main documentation tool by Multics since 1963.
-Robert ("Bob") H. Morris ported it to the GE-635 and called it
+The RUNOFF typesetting system, whose input forms the basis for
 .Nm ,
-Doug McIlroy rewrote it in BCPL in 1969,
-Joseph F. Ossanna rewrote it in PDP-11 assembly in 1973,
-and Brian W. Kernighan rewrote it in C in 1975.
+was written in MAD and FAP for the CTSS operating system by Jerome E.
+Saltzer in 1964.
+Doug McIlroy rewrote it in BCPL in 1969, renaming it
+.Nm .
+Dennis M. Ritchie rewrote McIlroy's
+.Nm
+in PDP-11 assembly for
+.At v1 ,
+Joseph F. Ossanna improved roff and renamed it nroff
+for
+.At v2 ,
+then ported nroff to C as troff, which Brian W. Kernighan released with
+.At v7 .
+In 1989, James Clarke re-implemented troff in C++, naming it groff.
 .Sh AUTHORS
 .An -nosplit
 This
 .Nm
 reference was written by
-.An Kristaps Dzonsons ,
-.Mt kristaps@bsd.lv ;
+.An Kristaps Dzonsons Aq Mt kristaps@bsd.lv
 and
-.An Ingo Schwarze ,
-.Mt schwarze@openbsd.org .
+.An Ingo Schwarze Aq Mt schwarze@openbsd.org .