Add missing extension to migration_template argument

Author: petergoldstein

lib/generators/acts_as_commentable_upgrade_migration/acts_as_commentable_upgrade_migration_generator.rb

@@ -13,7 +13,7 @@ def self.next_migration_number(dirname)
   end
 
   def manifest
-    migration_template 'migration.rb', 'db/migrate/acts_as_commentable_upgrade_migration'
+    migration_template 'migration.rb', 'db/migrate/acts_as_commentable_upgrade_migration.rb'
     copy_file 'comment.rb', 'app/models/comment.rb'
   end
 end

lib/generators/acts_as_commentable_with_threading_migration/acts_as_commentable_with_threading_migration_generator.rb

@@ -13,7 +13,7 @@ def self.next_migration_number(dirname)
   end
 
   def manifest
-    migration_template 'migration.rb', 'db/migrate/acts_as_commentable_with_threading_migration'
+    migration_template 'migration.rb', 'db/migrate/acts_as_commentable_with_threading_migration.rb'
     copy_file 'comment.rb', 'app/models/comment.rb'
   end
 end