[gnumeric] autogen: avoid egrep.

[Morten Welinder <mortenw src gnome org>]

commit 7b6e42edeb6642b33a34d91ecc1e07933a93d04d
Author: Morten Welinder <terra gnome org>
Date:   Wed Sep 21 11:15:47 2022 -0400

    autogen: avoid egrep.
    
    Use grep -E instead.

 autogen.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index dd26778a6..829c9c078 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -49,11 +49,11 @@ rm -f $srcdir/po-functions/POTFILES.in $srcdir/po-functions/POTFILES.skip
 # This regex matches names of XML files:
 xml_file_name='^((schemas|templates)/.+|[^/]+)\.in$|\.(glade|xml)(\.in)?$'
 ( echo "# Generated by autogen.sh; do not edit."
-  egrep -v "^#|$xml_file_name" $srcdir/po/POTFILES.in
+  grep -E -v "^#|$xml_file_name" $srcdir/po/POTFILES.in
 ) >$srcdir/po-functions/POTFILES.in
 ( echo "# Generated by autogen.sh; do not edit."
   test -f $srcdir/po/POTFILES.skip && grep -v '^#' $srcdir/po/POTFILES.skip
-  egrep "$xml_file_name" $srcdir/po/POTFILES.in
+  grep -E "$xml_file_name" $srcdir/po/POTFILES.in
 ) >$srcdir/po-functions/POTFILES.skip