Add empty lines at end of migration scripts.

Author: jtwatson

database/spanner/examples/migrations2/1481574547_create_users_table.down.sql

@@ -1 +1 @@
-DROP TABLE Users;
+DROP TABLE Users;

database/spanner/examples/migrations2/1481574547_create_users_table.up.sql

@@ -12,4 +12,4 @@ CREATE UNIQUE INDEX UsersEmailIndex ON Users (Email);
 INSERT INTO Users(UserId, Name, Email)
   VALUES
   (100, "Username", "[email protected]"),
-  (200, "Username2", "[email protected]");
+  (200, "Username2", "[email protected]");

database/spanner/examples/migrations2/1496539702_add_city_to_users.down.sql

@@ -1 +1 @@
-ALTER TABLE Users DROP COLUMN city;
+ALTER TABLE Users DROP COLUMN city;

database/spanner/examples/migrations2/1496539702_add_city_to_users.up.sql

@@ -1 +1 @@
-ALTER TABLE Users ADD COLUMN city STRING(100);
+ALTER TABLE Users ADD COLUMN city STRING(100);