Various linter fixes.

Summary:
- Removed trailing newlines.
- Added newline at EOF.
- Removed leading newlines.
- Trimmed trailing whitespace.
- Spelling fix.
- Added newline at EOF

Test Plan: N/A

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley

CC: hach-que, chad, Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D8344

src/docs/user/contributing/php_coding_standards.diviner

@@ -167,4 +167,3 @@ diffs which add elements to the array affect only one line.
       return $this->favoriteFood;
     }
   }
-