Tests/AnonClassParenthesisOwnerTest: use named data sets

With non-named data sets, when a test fails, PHPUnit will display the number of the test which failed.

With tests which have a _lot_ of data sets, this makes it _interesting_ (and time-consuming) to debug those, as one now has to figure out which of the data sets in the data provider corresponds to that number.

Using named data sets makes debugging failing tests more straight forward as PHPUnit will display the data set name instead of the number.
Using named data sets also documents what exactly each data set is testing.

Includes minor data set array normalization.
Includes making the data types in the docblocks more specific.

Author: jrfnl

tests/Core/Tokenizer/AnonClassParenthesisOwnerTest.php

@@ -70,13 +70,17 @@ public function testAnonClassNoParenthesesNextOpenClose($testMarker)
      * @see testAnonClassNoParentheses()
      * @see testAnonClassNoParenthesesNextOpenClose()
      *
-     * @return array
+     * @return array<string, array<string, string>>
      */
     public static function dataAnonClassNoParentheses()
     {
         return [
-            ['/* testNoParentheses */'],
-            ['/* testNoParenthesesAndEmptyTokens */'],
+            'plain'                                              => [
+                'testMarker' => '/* testNoParentheses */',
+            ],
+            'declaration contains comments and extra whitespace' => [
+                'testMarker' => '/* testNoParenthesesAndEmptyTokens */',
+            ],
         ];
 
     }//end dataAnonClassNoParentheses()
@@ -129,13 +133,17 @@ public function testAnonClassWithParentheses($testMarker)
      *
      * @see testAnonClassWithParentheses()
      *
-     * @return array
+     * @return array<string, array<string, string>>
      */
     public static function dataAnonClassWithParentheses()
     {
         return [
-            ['/* testWithParentheses */'],
-            ['/* testWithParenthesesAndEmptyTokens */'],
+            'plain'                                              => [
+                'testMarker' => '/* testWithParentheses */',
+            ],
+            'declaration contains comments and extra whitespace' => [
+                'testMarker' => '/* testWithParenthesesAndEmptyTokens */',
+            ],
         ];
 
     }//end dataAnonClassWithParentheses()