Fix "Save as Copy" for article
Code style
Merge pull request #4931 from wilsonge/patch-24

Code style
Modify ruleset
Fix outstanding rules
Merge pull request #4929 from wilsonge/rulset

More travis code style checks
Merge pull request #4916 from joomdonation/patch-2

Fix "Save as Copy" for article issue
[imp] Update CONTRIBUTING.md. Closes #4915

Followed the normal style of using the long form 'pull request' once with short form in brackets (PR) which enables PR to be used for the rest of the document. Grammar and small change for readability.
[fix] Add drop column support for PostgreSQL in Extension manager => Database. Fixes #3313.
[Code Style] Remove blanks