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

CWRU/CWRU.chlog

@@ -7143,3 +7143,61 @@ lib/sh/unicode.c
 	  nl_langinfo (CODESET) if HAVE_LANGINFO_CODESET is define, since
 	  we no longer check for nl_langinfo. This is what locale.c does.
 
+				   7/15
+				   ----
+lib/readline/display.c
+	- rl_redisplay: rudimentary code to handle some cases where the line
+	  buffer consumes more than the physical number of screen lines. It's
+	  not a screen editor, but it handles some of the common cases.
+	  From https://bugs.launchpad.net/ubuntu/+source/bash/+bug/2024628
+
+				   7/17
+				   ----
+builtins/printf.def
+	- getwidestr: make sure to force mbsrtowcs to convert the closing NULL
+	  so the wide-character string is NULL-terminated.
+	  From a report by Grisha Levit <grishalevit@gmail.com>
+
+lib/sh/shmatch.c
+	- strregerror: new function to return regerror(3) error message text
+	  in allocated memory
+	- sh_regmatch: add an additional argument to hold the error message
+	  from regerror(3), in newly-allocated memory; generated by call to
+	  strregerror() on regcomp(3) failure
+	  From a patch by Grisha Levit <grishalevit@gmail.com>
+
+externs.h
+	- sh_regmatch: update extern declaration
+
+execute_cmd.c
+	- execute_cond_node: pass pointer to buffer to return any error
+	  message; if sh_regmatch returns 2, use a non-NULL error buffer in
+	  the error message.
+
+lib/readline/bind.c
+	- _rl_get_string_variable_value: return the values for
+	  active-region-start-color (_rl_active_region_start_color) and
+	  active-region-end-color (_rl_active_region_end_color) if they
+	  are set.
+	  Fixes bind -v issue reported by Sebastian Carlos <sebaaa1754@gmail.com>
+	- _rl_get_string_variable_value: if the history is stifled, make
+	  sure we report the history size as < 0 so the output of bind -v
+	  can be reused as input.
+	  Fixes bind -v issue reported by Sebastian Carlos <sebaaa1754@gmail.com>
+
+				   7/19
+				   ----
+lib/readline/bind.c
+	- _rl_macro_dumper_internal: if print_readably is < 0, don't
+	  `untranslate' the macro value for an inputrc setting; leave it in
+	  such a way that `bind' can use it. Print the value without the
+	  enclosing double quotes.
+	  From a report by Grisha Levit <grishalevit@gmail.com>
+
+lib/readline/doc/rltech.texi
+	- rl_macro_dumper: document new semantics for print_readably
+
+bashline.c
+	- print_unix_command_map: call rl_macro_dumper with an argument of -1
+	  so we can use the output directly in another call to bind -x.
+