BackfillFnTokenTest: rename two test cases

... to be more descriptive.

Author: jrfnl

tests/Core/Tokenizers/PHP/BackfillFnTokenTest.inc

@@ -77,10 +77,10 @@ $fn = fn($x) : ?\My\NS\ClassName => $x;
 /* testReturnTypePartiallyQualifiedClass */
 $fn = fn($x) : ?NS\ClassName => $x;
 
-/* testNullableNamespace */
+/* testNullableUnqualifiedClassName */
 $a = fn(?\DateTime $x) : ?\DateTime => $x;
 
-/* testNamespaceOperatorInTypes */
+/* testNamespaceRelativeClassNameInTypes */
 $fn = fn(namespace\Foo $a) : ?namespace\Foo => $a;
 
 /* testSelfReturnType */

tests/Core/Tokenizers/PHP/BackfillFnTokenTest.php

@@ -362,7 +362,7 @@ public function testYield()
 
 
     /**
-     * Test arrow functions that use nullable namespace types.
+     * Test arrow functions that use nullable type with unqualified class name.
      *
      * @covers PHP_CodeSniffer\Tokenizers\PHP::processAdditional
      *
@@ -424,29 +424,29 @@ public function testReturnTypePartiallyQualifiedClass()
      *
      * @return void
      */
-    public function testNullableNamespace()
+    public function testNullableUnqualifiedClassName()
     {
-        $token = $this->getTargetToken('/* testNullableNamespace */', T_FN);
+        $token = $this->getTargetToken('/* testNullableUnqualifiedClassName */', T_FN);
         $this->backfillHelper($token);
         $this->scopePositionTestHelper($token, 13, 16);
 
-    }//end testNullableNamespace()
+    }//end testNullableUnqualifiedClassName()
 
 
     /**
-     * Test arrow functions that use the namespace operator in the return type.
+     * Test arrow functions that use namespace relative class name in the return type.
      *
      * @covers PHP_CodeSniffer\Tokenizers\PHP::processAdditional
      *
      * @return void
      */
-    public function testNamespaceOperatorInTypes()
+    public function testNamespaceRelativeClassNameInTypes()
     {
-        $token = $this->getTargetToken('/* testNamespaceOperatorInTypes */', T_FN);
+        $token = $this->getTargetToken('/* testNamespaceRelativeClassNameInTypes */', T_FN);
         $this->backfillHelper($token);
         $this->scopePositionTestHelper($token, 12, 15);
 
-    }//end testNamespaceOperatorInTypes()
+    }//end testNamespaceRelativeClassNameInTypes()
 
 
     /**