Avoid one-or-more (\+) non BRE in sed scripts.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-rebase--interactive.sh

@@ -190,7 +190,7 @@ nth_string () {
 
 make_squash_message () {
 	if test -f "$SQUASH_MSG"; then
-		COUNT=$(($(sed -n "s/^# This is [^0-9]*\([0-9]\+\).*/\1/p" \
+		COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
 			< "$SQUASH_MSG" | tail -n 1)+1))
 		echo "# This is a combination of $COUNT commits."
 		sed -n "2,\$p" < "$SQUASH_MSG"

git-rebase.sh

@@ -69,13 +69,10 @@ continue_merge () {
 			die "$RESOLVEMSG"
 		fi
 		printf "Committed: %0${prec}d " $msgnum
-		git rev-list --pretty=oneline -1 HEAD | \
-			sed 's/^[a-f0-9]\+ //'
 	else
 		printf "Already applied: %0${prec}d " $msgnum
-		git rev-list --pretty=oneline -1 "$cmt" | \
-			sed 's/^[a-f0-9]\+ //'
 	fi
+	git rev-list --pretty=oneline -1 "$cmt" | sed -e 's/^[^ ]* //'
 
 	prev_head=`git rev-parse HEAD^0`
 	# save the resulting commit so we can read-tree on it later