changes to documentation to reduce gender-specific language; fix a seg fault in `fc'

doc/bash.1

@@ -5,12 +5,12 @@
 .\"	Case Western Reserve University
 .\"	chet.ramey@case.edu
 .\"
-.\"	Last Change: Tue Jun 15 09:39:48 EDT 2021
+.\"	Last Change: Wed Jun 16 09:50:34 EDT 2021
 .\"
 .\" bash_builtins, strip all but Built-Ins section
 .if \n(zZ=1 .ig zZ
 .if \n(zY=1 .ig zY
-.TH BASH 1 "2021 June 15" "GNU Bash 5.1"
+.TH BASH 1 "2021 June 16" "GNU Bash 5.1"
 .\"
 .\" There's some problem with having a `@'
 .\" in a tagged paragraph with the BSD man macros.
@@ -3897,7 +3897,7 @@ Matches one or more occurrences of the given patterns
 Matches one of the given patterns
 .TP
 \fB!(\fP\^\fIpattern-list\^\fP\fB)\fP
-Matches anything except one of the given patterns.
+Matches anything except one of the given patterns
 .RE
 .PD
 .PP
@@ -5847,6 +5847,8 @@ If the number of possible completions is greater than
 or equal to the value of this variable,
 readline will ask whether or not the user wishes to view them;
 otherwise they are simply listed on the terminal.
+A zero value means readline should never ask; negative values are
+treated as zero.
 .TP
 .B convert\-meta (On)
 If set to \fBOn\fP, readline will convert characters with the