Fix PHP CS Fixer violations in AbstractDns01Handler

Align assignment operators in propagationDelay(), expand single-line
method body to full brace style, and remove space before arrow function
parenthesis to satisfy binary_operator_spaces, braces_position, and
function_declaration rules.

Author: bashgeek

src/Challenge/Dns/AbstractDns01Handler.php

@@ -48,7 +48,7 @@ final public function supports(AuthorizationChallengeEnum $type): bool
      */
     public function propagationDelay(int $seconds): static
     {
-        $clone = clone $this;
+        $clone                       = clone $this;
         $clone->propagationDelaySecs = max(0, $seconds);
 
         return $clone;

tests/Unit/Challenge/Dns/AbstractDns01HandlerTest.php

@@ -41,7 +41,10 @@ public function cleanup(string $domain, string $token): void
     $handler = new class extends AbstractDns01Handler {
         public function deploy(string $d, string $t, string $k): void {}
         public function cleanup(string $d, string $t): void {}
-        public function name(string $domain): string { return $this->challengeName($domain); }
+        public function name(string $domain): string
+        {
+            return $this->challengeName($domain);
+        }
     };
 
     expect($handler->name('example.com'))->toBe('_acme-challenge.example.com');
@@ -59,7 +62,7 @@ public function name(string $domain): string { return $this->challengeName($doma
 it('propagationDelay clamps negative values to zero', function () {
     // Negative delays should not cause a sleep — verify no exception is thrown
     $handler = (new TestDns01Handler())->propagationDelay(-10);
-    expect(fn () => $handler->deploy('example.com', 't', 'k'))->not->toThrow(\Throwable::class);
+    expect(fn() => $handler->deploy('example.com', 't', 'k'))->not->toThrow(\Throwable::class);
 });
 
 it('deploy and cleanup record their arguments', function () {