parse extended glob patterns in command substitutions in compatibility mode, even if extglob is not set

doc/bash.1

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 .\"	Case Western Reserve University
 .\"	chet.ramey@case.edu
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-.\"	Last Change: Thu Jun 16 17:10:54 EDT 2022
+.\"	Last Change: Fri Jul 29 08:59:32 EDT 2022
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 .\" bash_builtins, strip all but Built-Ins section
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 .if \n(zY=1 .ig zY
-.TH BASH 1 "2022 June 16" "GNU Bash 5.2"
+.TH BASH 1 "2022 July 29" "GNU Bash 5.2"
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@@ -3984,6 +3984,12 @@ Matches anything except one of the given patterns
 .RE
 .PD
 .PP
+The\fBextglob\fP option changes the behavior of the parser, since the
+parentheses are normally treated as operators with syntactic meaning.
+To ensure that extended matching patterns are parsed correctly, make sure
+that \fBextglob\fP is enabled before parsing constructs containing the
+patterns, including shell functions and command substitutions.
+.PP
 When matching filenames, the \fBdotglob\fP shell option determines
 the set of filenames that are tested:
 when \fBdotglob\fP is enabled, the set of filenames includes all files