4701 would like grep context options (-A, -B, -C)

@@ -48,11 +48,11 @@
 .sp
 .LP
 Be careful using the characters \fB$\fR, \fB*\fR, \fB[\fR, \fB^\fR, \fB|\fR,
 \fB(\fR, \fB)\fR, and \fB\e\fR in the \fIpattern_list\fR because they are also
 meaningful to the shell. It is safest to enclose the entire \fIpattern_list\fR
-in single quotes \fBa\'\fR\&...\fBa\'\fR\&.
+in single quotes \fB\'\fR\&...\fB\'\fR\&.
 .sp
 .LP
 If no files are specified, \fBgrep\fR assumes standard input. Normally, each
 line found is copied to standard output. The file name is printed before each
 line found if there is more than one input file.

@@ -205,10 +205,48 @@
 .sp
 .LP
 The following options are supported for \fB/usr/xpg4/bin/grep\fR only:
 .sp
 .ne 2
+.na
+\fB\fB-A\fR \fInumber\fR\fR
+.ad
+.RS 19n
+Prints \fInumber\fR input lines of context after each matching line. If there
+are multiple matching lines, their context lines are separated by a \fB--\fR
+delimiter line.
+.RE
+
+.sp
+.ne 2
+.na
+\fB\fB-B\fR \fInumber\fR\fR
+.ad
+.RS 19n
+Prints \fInumber\fR input lines of context before each matching line. If there
+are multiple matching lines, their context lines are separated by a \fB--\fR
+delimiter line.
+.RE
+
+.sp
+.ne 2
+.na
+\fB\fB-\fR\fInumber\fR\fR
+.ad
+.br
+.na
+\fB\fB-C\fR \fInumber\fR\fR
+.ad
+.RS 19n
+Prints \fInumber\fR input lines of context before and \fInumber\fR input lines
+of context after each matching line. If there are multiple matching lines,
+their context lines are separated by a \fB--\fR delimiter line.
+.RE
+
+
+.sp
+.ne 2
 .na
 \fB\fB-e\fR \fIpattern_list\fR\fR
 .ad
 .RS 19n
 Specifies one or more patterns to be used during the search for input. Patterns