Corrections to 'About overriding themable output' page

Documentation location/URL

https://www.drupal.org/node/173880

Problem/Motivation

The documentation page needs to be corrected.

Original:"The example is from Drupal 6 and shows Garland is using the name of the theme engine for the override. Again, in Drupal 6 it is recommended to use the theme name and in Drupal 7 it is mandatory to use the theme name."
Suggested change, correcting typo, adding comma and adding missing word:
Changed:"The example is from Drupal 6 and shows that Garland is using the name of the theme engine for the override. Again, in Drupal 6 it is recommended to use the theme name, and in Drupal 7 it is mandatory to use the theme name."

Original:"On the "Administer > Site configuration > Performance" page, click on the "Clear cached data" button."
Suggested change, adding Drupal 7 path as default and Drupal 6 path as secondary:
Changed:"On the "Administration > Configuration > Development > Performance" page, click on the "Clear all caches" button. In Drupal 6, navigate to the "Administer > Site configuration > Performance" page and click on the "Clear cached data" button."

Original:"Since a lot more work is being done under the hood, the cached instructions speeds up the process especially for templates."
Suggested change, correcting typo:
Changed:Since a lot more work is being done under the hood, the cached instructions speed up the process, especially for templates.