Merge branch '5.4' into 6.4

* 5.4:
  [Router] Discard in-memory cache of routes when writing the file-based cache
  [Security] Verify Hungarian translation
  force HTTP 1.1 for Mailgun API requests
  [String] Revert "Fixed u()->snake(), b()->snake() and s()->snake() methods"
  normalize underscores in snake()
  [Security][Validator] Added missing Portuguese(pt) translations
  Fixes #54550 some pt_BR translations
  Fix MockArraySessionStorage to generate more conform ids
  Bump Symfony version to 5.4.42
  Update VERSION for 5.4.41
  Update CONTRIBUTORS for 5.4.41
  Update CHANGELOG for 5.4.41

Author: derrabus

AbstractUnicodeString.php

@@ -155,7 +155,7 @@ public function ascii(array $rules = []): self
     public function camel(): static
     {
         $str = clone $this;
-        $str->string = str_replace(' ', '', preg_replace_callback('/\b.(?![A-Z]{2,})/u', static function ($m) {
+        $str->string = str_replace(' ', '', preg_replace_callback('/\b.(?!\p{Lu})/u', static function ($m) {
             static $i = 0;
 
             return 1 === ++$i ? ('İ' === $m[0] ? 'i̇' : mb_strtolower($m[0], 'UTF-8')) : mb_convert_case($m[0], \MB_CASE_TITLE, 'UTF-8');
@@ -346,8 +346,8 @@ public function reverse(): static
 
     public function snake(): static
     {
-        $str = clone $this;
-        $str->string = str_replace(' ', '_', mb_strtolower(preg_replace(['/(\p{Lu}+)(\p{Lu}\p{Ll})/u', '/([\p{Ll}0-9])(\p{Lu})/u'], '\1 \2', $str->string), 'UTF-8'));
+        $str = $this->camel();
+        $str->string = mb_strtolower(preg_replace(['/(\p{Lu}+)(\p{Lu}\p{Ll})/u', '/([\p{Ll}0-9])(\p{Lu})/u'], '\1_\2', $str->string), 'UTF-8');
 
         return $str;
     }

ByteString.php

@@ -342,8 +342,8 @@ public function slice(int $start = 0, ?int $length = null): static
 
     public function snake(): static
     {
-        $str = clone $this;
-        $str->string = str_replace(' ', '_', strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], '\1 \2', $str->string)));
+        $str = $this->camel();
+        $str->string = strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], '\1_\2', $str->string));
 
         return $str;
     }

Tests/AbstractAsciiTestCase.php

@@ -1044,6 +1044,7 @@ public static function provideCamel()
             ['symfonyIsGreat', 'symfony_is_great'],
             ['symfony5IsGreat', 'symfony_5_is_great'],
             ['symfonyIsGreat', 'Symfony is great'],
+            ['SYMFONYISGREAT', 'SYMFONY_IS_GREAT'],
             ['symfonyIsAGreatFramework', 'Symfony is a great framework'],
             ['symfonyIsGREAT', '*Symfony* is GREAT!!'],
             ['SYMFONY', 'SYMFONY'],
@@ -1075,8 +1076,12 @@ public static function provideSnake()
             ['symfony_is_great', 'symfonyIsGREAT'],
             ['symfony_is_really_great', 'symfonyIsREALLYGreat'],
             ['symfony', 'SYMFONY'],
-            ['symfony_is_great', 'SYMFONY IS GREAT'],
-            ['symfony_is_great', 'SYMFONY_IS_GREAT'],
+            ['symfonyisgreat', 'SYMFONY IS GREAT'],
+            ['symfonyisgreat', 'SYMFONY_IS_GREAT'],
+            ['symfony_is_great', 'symfony    is     great'],
+            ['symfonyisgreat', 'SYMFONY    IS     GREAT'],
+            ['symfonyisgreat', 'SYMFONY _ IS _ GREAT'],
+            ['symfony_isgreat', 'Symfony IS GREAT!'],
         ];
     }