Merge pull request #4845 from ProcessEight/patch-10

Update theme-best-practice.md

Author: dobooth

guides/v2.2/frontend-dev-guide/theme-best-practice.md

@@ -28,4 +28,4 @@ Some other customizations that can be performed using layout instructions are th
 4. Use `<theme_dir>/etc/view.xml` to change image types sizes or add your own types. See [Configure images properties]({{ page.baseurl }}/frontend-dev-guide/themes/theme-images.html) for details. Use this file also to [customize product gallery widget]({{ page.baseurl }}/javascript-dev-guide/widgets/widget_gallery.html)
 5. If you need to change the wording in user interface, [add custom CSV dictionary files]({{ page.baseurl }}/frontend-dev-guide/translations/theme_dictionary.html) instead of overriding `.phtml` templates. 
 
-Keep in mind, that after Magento instances, updates or upgrades something can change in default templates, layouts, and styles. So it is recommended to check if the changes effected the files overridden in your theme and copy changes if any, to your templates, layouts, and styles.
+Keep in mind that, after updating or upgrading Magento instances, there may be changes to default templates, layouts and styles. So it is recommended to check if those changes affect any files overridden in your theme and if so, copy the changes to your templates, layouts, and styles.