Merge branch '4.1'

* 4.1:
  Undeprecate the single-colon notation for controllers
  Command::addOption should allow int in $default
  Update symfony links to https
  [Form] Fixed keeping hash of equal \DateTimeInterface on submit
  [PhpUnitBridge] Fix typo
  [Routing] generate(null) should throw an exception
  [Form] Minor fixes in docs and cs
  [Workflow] Made code simpler
  [Config] Unset key during normalization
  [Form] Fixed empty data for compound date types
  invalidate forms on transformation failures
  [FrameworkBundle] fixed guard event names for transitions
  method buildTransitionBlockerList returns TransitionBlockerList of expected transition
  [FrameworkBundle] fixed guard event names for transitions
  [PropertyAccessor] Fix unable to write to singular property using setter while plural adder/remover exist

Author: nicolas-grekas

DeprecationErrorHandler.php

@@ -33,7 +33,7 @@ class DeprecationErrorHandler
      * - use "/some-regexp/" to stop the test suite whenever a deprecation
      *   message matches the given regular expression;
      * - use a number to define the upper bound of allowed deprecations,
-     *   making the test suite fail whenever more notices are trigerred.
+     *   making the test suite fail whenever more notices are triggered.
      *
      * @param int|string|false $mode The reporting mode, defaults to not allowing any deprecations
      */