change redisplay to handle some cases where the line consumes more than the number of physical screen lines; add regerror() error messages if regular expression compilation fails; make sure active region readline variables are displayed with bind -v; partial fix for bind -x and commands containing quoting characters

doc/bash.1

@@ -5,12 +5,12 @@
 .\"	Case Western Reserve University
 .\"	chet.ramey@case.edu
 .\"
-.\"	Last Change: Fri Jul  7 15:07:53 EDT 2023
+.\"	Last Change: Wed Jul 19 14:23:20 EDT 2023
 .\"
 .\" bash_builtins, strip all but Built-Ins section
 .if \n(zZ=1 .ig zZ
 .if \n(zY=1 .ig zY
-.TH BASH 1 "2023 July 7" "GNU Bash 5.3"
+.TH BASH 1 "2023 July 19" "GNU Bash 5.3"
 .\"
 .\" There's some problem with having a `@'
 .\" in a tagged paragraph with the BSD man macros.
@@ -6116,9 +6116,13 @@ If set to \fBnone\fP, readline never rings the bell.  If set to
 If set to \fBaudible\fP, readline attempts to ring the terminal's bell.
 .TP
 .B bind\-tty\-special\-chars (On)
-If set to \fBOn\fP, readline attempts to bind the control characters
-treated specially by the kernel's terminal driver to their readline
-equivalents.
+If set to \fBOn\fP (the default), readline attempts to bind the control 
+characters that are  
+treated specially by the kernel's terminal driver to their  
+readline equivalents.
+These override the default readline bindings described here.
+Type \f(CWstty -a\fP at a bash prompt to see your current terminal settings,
+including the special control characters (usually \fBcchars\fP).
 .TP
 .B blink\-matching\-paren (Off)
 If set to \fBOn\fP, readline attempts to briefly move the cursor to an
@@ -9954,6 +9958,10 @@ before execution resumes after the function or script.
 .PD 0
 .TP
 \fBset\fP [\fB+abefhkmnptuvxBCEHPT\fP] [\fB+o\fP \fIoption\-name\fP] [\fB\-\-\fP] [\fB\-\fP] [\fIarg\fP ...]
+.TP
+\fBset \-o\fP
+.TP
+\fBset \+o\fP
 .PD
 Without options, display the name and value of each shell variable
 in a format that can be reused as input
@@ -10201,14 +10209,15 @@ Same as
 .PP
 If
 .B \-o
-is supplied with no \fIoption\-name\fP, the values of the current options are
-printed.
+is supplied with no \fIoption\-name\fP,
+\fBset\fP prints the current shell option settings.
 If
 .B +o
-is supplied with no \fIoption\-name\fP, a series of
+is supplied with no \fIoption\-name\fP,
+\fBset\fP prints a series of
 .B set
-commands to recreate the current option settings is displayed on
-the standard output.
+commands to recreate the current option settings
+on the standard output.
 .RE
 .TP 8
 .B \-p