readline: use a custom extension in LS_COLORS to set the colored completion prefix, if present

lib/readline/doc/readline.3

@@ -6,9 +6,9 @@
 .\"	Case Western Reserve University
 .\"	chet.ramey@case.edu
 .\"
-.\"	Last Change: Wed Jun 16 09:49:37 EDT 2021
+.\"	Last Change: Mon Nov 15 17:06:54 EST 2021
 .\"
-.TH READLINE 3 "2021 June 16" "GNU Readline 8.1"
+.TH READLINE 3 "2021 November 15" "GNU Readline 8.1"
 .\"
 .\" File Name macro.  This used to be `.PN', for Path Name,
 .\" but Sun doesn't seem to like that very much.
@@ -359,6 +359,9 @@ If set to \fBOn\fP, when listing completions, readline displays the
 common prefix of the set of possible completions using a different color.
 The color definitions are taken from the value of the \fBLS_COLORS\fP
 environment variable.
+If there is a color definition in \fB$LS_COLORS\fP for the custom suffix
+"readline-colored-completion-prefix", readline uses this color for
+the common prefix instead of its default.
 .TP
 .B colored\-stats (Off)
 If set to \fBOn\fP, readline displays possible completions using different

lib/readline/doc/rluser.texi

@@ -445,6 +445,9 @@ If set to @samp{on}, when listing completions, Readline displays the
 common prefix of the set of possible completions using a different color.
 The color definitions are taken from the value of the @env{LS_COLORS}
 environment variable.
+If there is a color definition in @env{LS_COLORS} for the custom suffix
+@samp{readline-colored-completion-prefix}, Readline uses this color for
+the common prefix instead of its default.
 The default is @samp{off}.
 
 @item colored-stats

lib/readline/doc/version.texi

@@ -4,7 +4,7 @@ Copyright (C) 1988-2021 Free Software Foundation, Inc.
 
 @set EDITION 8.1
 @set VERSION 8.1
-@set UPDATED 16 June 2021
-@set UPDATED-MONTH June 2021
+@set UPDATED 15 November 2021
+@set UPDATED-MONTH November 2021
 
-@set LASTCHANGE Wed Jun 16 09:50:11 EDT 2021
+@set LASTCHANGE Mon Nov 15 17:05:28 EST 2021