Quick Docs: Ignore vendor prefixes if needed
Fix minor TimingFunction validation issue
Merge remote-tracking branch 'upstream/master' into wp-docs-vendor-prefixes
Use a more strict RegExp
Merge remote-tracking branch 'upstream/master' into timing-function-editor-exception
Use unary operator to sort out invalid numbers
Added unit test
Added unit tests
Fix CSSUtils to work better with vendor-prefixed properties
Merge pull request #8739 from MarcelGerber/wp-docs-vendor-prefixes

Quick Docs: Ignore vendor prefixes if needed
Merge pull request #8910 from MarcelGerber/timing-function-editor-exception

Fix minor TimingFunction validation issue