applymbox & quiltimport: typofix.

6777c380 fixed only one of three typos introduced in an earlier
patch 87ab7992.  This fixes the other two.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

git-applymbox.sh

@@ -78,7 +78,7 @@ do
 	    git-mailinfo $keep_subject $utf8 \
 		.dotest/msg .dotest/patch <$i >.dotest/info || exit 1
 	    test -s .dotest/patch || {
-		echo "Patch is empty.  Was is split wrong?"
+		echo "Patch is empty.  Was it split wrong?"
 		exit 1
 	    }
 	    git-stripspace < .dotest/msg > .dotest/msg-clean

git-quiltimport.sh

@@ -74,7 +74,7 @@ for patch_name in $(cat "$QUILT_PATCHES/series" | grep -v '^#'); do
 	echo $patch_name
 	(cat $QUILT_PATCHES/$patch_name | git-mailinfo "$tmp_msg" "$tmp_patch" > "$tmp_info") || exit 3
 	test -s .dotest/patch || {
-		echo "Patch is empty.  Was is split wrong?"
+		echo "Patch is empty.  Was it split wrong?"
 		exit 1
 	}