Merge branch '4.1' into 4.2

* 4.1:
  Fix typos in doc blocks
  [Debug] ignore underscore vs backslash namespaces in DebugClassLoader
  [TwigBridge][Form] Prevent multiple rendering of form collection prototypes
  [FrameworkBundle] fix describing routes with no controllers
  [DI] move RegisterServiceSubscribersPass before DecoratorServicePass
  Update ValidationListener.php
  [Yaml] ensures that the mb_internal_encoding is reset to its initial value
  [WebLink] Fixed documentation link
  [Security] getTargetPath of TargetPathTrait must return string or null
  [Hackday][Serializer] Deserialization ignores argument type hint from phpdoc for array in constructor argument
  Optimize perf by replacing call_user_func with dynamic vars
  [Routing] fix dumping same-path routes with placeholders
  [Security] defer log message in guard authenticator
  [Validator] Added IBAN format for Vatican City State
  merge conflicts
  filter out invalid Intl values
  filter out invalid language values
  [Validator] Fixed grouped composite constraints
  [Form] Filter arrays out of scalar form types
  Fix HeaderBag::get phpdoc

Author: nicolas-grekas

XPath/Translator.php

@@ -155,7 +155,7 @@ public function nodeToXPath(NodeInterface $node): XPathExpr
             throw new ExpressionErrorException(sprintf('Node "%s" not supported.', $node->getNodeName()));
         }
 
-        return \call_user_func($this->nodeTranslators[$node->getNodeName()], $node, $this);
+        return $this->nodeTranslators[$node->getNodeName()]($node, $this);
     }
 
     /**
@@ -167,7 +167,7 @@ public function addCombination(string $combiner, NodeInterface $xpath, NodeInter
             throw new ExpressionErrorException(sprintf('Combiner "%s" not supported.', $combiner));
         }
 
-        return \call_user_func($this->combinationTranslators[$combiner], $this->nodeToXPath($xpath), $this->nodeToXPath($combinedXpath));
+        return $this->combinationTranslators[$combiner]($this->nodeToXPath($xpath), $this->nodeToXPath($combinedXpath));
     }
 
     /**
@@ -179,7 +179,7 @@ public function addFunction(XPathExpr $xpath, FunctionNode $function): XPathExpr
             throw new ExpressionErrorException(sprintf('Function "%s" not supported.', $function->getName()));
         }
 
-        return \call_user_func($this->functionTranslators[$function->getName()], $xpath, $function);
+        return $this->functionTranslators[$function->getName()]($xpath, $function);
     }
 
     /**
@@ -191,7 +191,7 @@ public function addPseudoClass(XPathExpr $xpath, string $pseudoClass): XPathExpr
             throw new ExpressionErrorException(sprintf('Pseudo-class "%s" not supported.', $pseudoClass));
         }
 
-        return \call_user_func($this->pseudoClassTranslators[$pseudoClass], $xpath);
+        return $this->pseudoClassTranslators[$pseudoClass]($xpath);
     }
 
     /**
@@ -203,7 +203,7 @@ public function addAttributeMatching(XPathExpr $xpath, string $operator, string
             throw new ExpressionErrorException(sprintf('Attribute matcher operator "%s" not supported.', $operator));
         }
 
-        return \call_user_func($this->attributeMatchingTranslators[$operator], $xpath, $attribute, $value);
+        return $this->attributeMatchingTranslators[$operator]($xpath, $attribute, $value);
     }
 
     /**