Merge branch '4.1'

* 4.1:
  Use the real image URL for the filesystem tests
  [Finder] Update PHPdoc append()
  [DI] Fix phpdoc
  Fix code examples in PHPDoc
  [HttpKernel] Fix inheritdocs
  bumped Symfony version to 3.4.16
  updated VERSION for 3.4.15
  updated CHANGELOG for 3.4.15

Author: sroze

TokenParser/DumpTokenParser.php

@@ -19,11 +19,10 @@
  * Token Parser for the 'dump' tag.
  *
  * Dump variables with:
- * <pre>
- *  {% dump %}
- *  {% dump foo %}
- *  {% dump foo, bar %}
- * </pre>
+ *
+ *     {% dump %}
+ *     {% dump foo %}
+ *     {% dump foo, bar %}
  *
  * @author Julien Galenski <julien.galenski@gmail.com>
  */