Fix typo in Migration to ActiveStorage

MIGRATING.md

@@ -116,7 +116,7 @@ create_table "active_storage_blobs", force: :cascade do |t|
 end
 end
 ```
 ```
 
 
-So, assuming you want to leave the files in the exact same place,  _this is
+So, assuming you want to leave the files in the exact same place, _this is
 your migration_. Otherwise, see the next section first and modify the migration
 your migration_. Otherwise, see the next section first and modify the migration
 to taste.
 to taste.
 
 
@@ -406,7 +406,7 @@ Then you'll end up with an n+1 as you load each attachment in the loop.
 So while the controller and model will work without change, you will want to
 So while the controller and model will work without change, you will want to
 double-check your loops and add `includes` as needed.
 double-check your loops and add `includes` as needed.
 
 
-ActiveStorage automatically declares `ActiveStorage::Attachement` and
+ActiveStorage automatically declares `ActiveStorage::Attachment` and
 `ActiveStorage::Blob` relationships to your models, along with eager-loading
 `ActiveStorage::Blob` relationships to your models, along with eager-loading
 scopes.
 scopes.