diff -u ast/src/cmd/ksh93/ksh.1.orig ast/src/cmd/ksh93/ksh.1
// Ah yes, back to the man page again.  The '\(bv' being used for the vertical
// bar was fairly hard to see and you could not search the man page for '||'.
// Changed the '\(bv' to '|'.  FWIW - "groff_char(7)" implies '|' is okay.
// There is at least one '|\||' that might need to be changed to '||'.
// There's also one typo fix.  Saw another one but cannot find it again.
--- ast/src/cmd/ksh93/ksh.1.orig	2018-09-03 05:33:48.188021300 -0400
+++ ast/src/cmd/ksh93/ksh.1	2018-09-04 02:13:50.799842300 -0400
@@ -93,7 +93,7 @@
 is one of the following characters:
 .PP
 .RS
-\f3;   &   (   )   \(bv   <   >   new-line   space   tab\fP
+\f3;   &   (   )   |   <   >   new-line   space   tab\fP
 .RE
 .PP
 A
@@ -184,7 +184,7 @@
 is a sequence of one or more
 .I commands\^
 separated by
-.BR \(bv .
+.BR | .
 The standard output of each command but the last
 is connected by a
 .IR pipe (2)
@@ -211,29 +211,29 @@
 separated by
 .BR ; ,
 .BR & ,
-.BR \(bv& ,
+.BR |& ,
 .BR && ,
 or
-.BR \(bv\|\(bv ,
+.BR |\|| ,
 and optionally terminated by
 .BR ; ,
 .BR & ,
 or
-.BR \(bv& .
+.BR |& .
 Of these five symbols,
 .BR ; ,
 .BR & ,
 and
-.B \(bv&
+.B |&
 have equal precedence,
 which is lower than that of
 .B &&
 and
-.BR \(bv\|\(bv .
+.BR |\|| .
 The symbols
 .B &&
 and
-.B \(bv\|\(bv
+.B |\||
 also have equal precedence.
 A semicolon
 .RB ( ; )
@@ -243,7 +243,7 @@
 .I not\^
 wait for that pipeline to finish).
 The symbol
-.B \(bv&
+.B |&
 causes asynchronous execution of the preceding pipeline
 with a two-way pipe established to the parent shell;
 the standard input and output of the spawned pipeline
@@ -265,7 +265,7 @@
 described later.
 The symbol
 .B &&
-.RB (\| \(bv\|\(bv \^)
+.RB (\| |\|| \^)
 causes the
 .I list\^
 following it to be executed only if the preceding
@@ -408,7 +408,7 @@
 .B PS3
 prompt for the next selection.
 .TP
-\f3case\fP \f2word\^\fP \f3in\fP \*(OK \*(OK\f3(\fP\*(CK\f2pattern\^\fP \*(OK \(bv \f2pattern\^\fP \*(CK .\|.\|. \f3)\fP \f2list\^\fP \f3;;\fP \*(CK .\|.\|. \f3esac\fP
+\f3case\fP \f2word\^\fP \f3in\fP \*(OK \*(OK\f3(\fP\*(CK\f2pattern\^\fP \*(OK | \f2pattern\^\fP \*(CK .\|.\|. \f3)\fP \f2list\^\fP \f3;;\fP \*(CK .\|.\|. \f3esac\fP
 A
 .B case
 command executes the
@@ -2647,11 +2647,11 @@
 with a
 .B &
 or
-.BR \(bv .
+.BR | .
 A
 .B &
 signifies that all patterns must be matched whereas
-.BR \(bv
+.BR |
 requires that only one pattern be matched.
 Composite patterns can be formed with one or more of the following sub-patterns:
 .PD 0
@@ -2728,7 +2728,7 @@
 is a two character sequence which cannot contain
 .B &
 or
-.BR \(bv .
+.BR | .
 The first
 .I pattern-pair\^
 specifies the starting and ending characters for the match.
@@ -3542,7 +3542,7 @@
 .I expression2\^
 are both true.
 .TP
-\f2expression1\fP \f3\(bv\(bv\fP \f2expression2\fP
+\f2expression1\fP \f3||\fP \f2expression2\fP
 True, if either
 .I expression1\^
 or
@@ -4638,7 +4638,7 @@
 When applied to the first word on the line,
 or the first word after a
 .BR ; ,
-.BR \(bv ,
+.BR | ,
 .BR & ,
 or
 .BR ( ,
@@ -5305,7 +5305,7 @@
 [\f2count\fP]\f3B\fP
 Cursor to preceding blank separated word.
 .TP 10
-[\f2count\fP]\f3\(bv\fP
+[\f2count\fP]\f3|\fP
 Cursor to column
 .IR count .
 .TP 10
@@ -6621,7 +6621,7 @@
 option causes the
 arguments to be written onto the pipe
 of the process spawned with
-.B \(bv&
+.B |&
 instead of standard output.
 The
 .B \-v
@@ -6935,7 +6935,7 @@
 to be taken from the input pipe
 of a process spawned by the shell
 using
-.BR \(bv& .
+.BR |& .
 If the
 .B \-s
 option is present,
@@ -7053,7 +7053,7 @@
 from truncating existing files.
 Files that are created are opened with the O_EXCL mode.
 Requires
-.B >\(bv
+.B >|
 to truncate a file when turned on.
 .TP 8
 .B \-G
@@ -7087,7 +7087,7 @@
 .TP 8
 .B \-e
 Unless contained in a
-.B \(bv\(bv
+.B ||
 or
 .B &&
 command, or the command following an
@@ -7291,8 +7291,8 @@
 Sort the positional parameters lexicographically.
 When used with
 .B \-A
-.TP 8
 sorts the elements of the array.
+.TP 8
 .B \-t
 (Obsolete).  Exit after reading and executing one command.
 .TP 8
@@ -8010,7 +8010,7 @@
 value.  Otherwise, the
 mask is printed in octal.
 The \-p
-option cause the output to be in a form that can be use for reinput.
+option causes the output to be in a form that can be use for reinput.
 .TP
 \(dg \f3unalias\fP \*(OK \f3\-a\fP \*(CK \f2name\^\fP .\|.\|.
 The aliases
@@ -8470,7 +8470,7 @@
 Some very old shell scripts contain a
 .B ^
 as a synonym for the pipe character
-.BR \(bv .
+.BR | .
 .PP
 Using the
 .B hist\^