Minor edits in the upgrading guide

Author: fxn

guides/source/upgrading_ruby_on_rails.md

@@ -138,15 +138,15 @@ config.eager_load_paths << config.root.join("lib")
 ```
 
 That still works, but it is recommended to replace those lines with the more
-concise and correct
+concise
 
 ```ruby
 config.autoload_lib(ignore: %w(assets tasks))
 ```
 
 Please, add to the `ignore` list any other `lib` subdirectories that do not
 contain `.rb` files, or that should not be reloaded or eager loaded. For
-example, if your applications has `lib/templates`, `lib/generators`, or
+example, if your application has `lib/templates`, `lib/generators`, or
 `lib/middleware`, you'd add their name relative to `lib`:
 
 ```ruby