[glibc] Fix BRE typos in check-safety.sh

[Paul Eggert <eggert@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=05967faf0e3df6aad07f0b05e138e86f82363deb

commit 05967faf0e3df6aad07f0b05e138e86f82363deb
Author: Paul Eggert <eggert@cs.ucla.edu>
Date:   Wed Sep 14 00:10:45 2022 -0500

    Fix BRE typos in check-safety.sh
    
    * manual/check-safety.sh: Fix BRE portability typos.
    POSIX says \] produces undefined results.

Diff:
---
 manual/check-safety.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/manual/check-safety.sh b/manual/check-safety.sh
index 21ddb3beb7..25f9fb5b11 100644
--- a/manual/check-safety.sh
+++ b/manual/check-safety.sh
@@ -109,15 +109,15 @@ success=false
 # optional comment about exclusions is between []s at the end of the
 # line.
 grep -n '^@c \+[^@ ]\+\( dup\)\?'\
-'\( @\(mt\|a[sc]\)[^ ]*\)*\( \[.*\]\)\?$' "$@" |
+'\( @\(mt\|a[sc]\)[^ ]*\)*\( \[.*]\)\?$' "$@" |
 grep -v ':@c *[^@{}]*\( @mt[^ {}]*\)*'\
-'\( @as[^ {}]*\)*\( @ac[^ {}]*\)*\( \[.*\]\)\?$' &&
+'\( @as[^ {}]*\)*\( @ac[^ {}]*\)*\( \[.*]\)\?$' &&
 success=false
 
 # Check that comments containing safety remarks do not contain
 # duplicate remarks.
 grep -n '^@c \+[^@ ]\+\( dup\)\?'\
-'\( @\(mt\|a[sc]\)[^ ]*\)*\( \[.*\]\)\?$' "$@" |
+'\( @\(mt\|a[sc]\)[^ ]*\)*\( \[.*]\)\?$' "$@" |
 grep '[^:]\(@\(mt\|a[sc]\)[^ ]*\) \(.*[^:]\)\?\1\($\| \)' &&
 success=false