Merge branch '3135359-temp' into '3.0.x'

Draft: Resolve #3135359 "Temp"

See merge request !50

tests/src/Unit/Plugin/Filter/FilterMarkdownTest.php

@@ -120,6 +120,7 @@ class FilterMarkdownTest extends MarkdownUnitTestBase {
  * __serialize() and __unserialize() to be defined. The PHP Unit mock builder
  * does not automatically defines these methods and does not think that it
  * should.
+ *
  * @see https://github.com/sebastianbergmann/phpunit/issues/4783
  */
 interface ParsedMarkdownInterface extends ParsedMarkdownInterfaceBase {