PHP/DevelopmentFunctions: update code comment for namespaced function calls tests

Author: rodrigoprimo

WordPress/Tests/PHP/DevelopmentFunctionsUnitTest.inc

@@ -37,7 +37,7 @@ Wrapper_Class::var_dump(); // OK, not the native PHP function.
 $wrapper ->var_dump(); // OK, not the native PHP function.
 
 /*
- * Safeguard support for PHP 8.0+ tokenization of namespaced "names".
+ * Safeguard correct handling of all types of namespaced function calls
  */
 \var_dump( $value );
 MyNamespace\var_dump( $value );