Issue #2778673 by neclimdul: UnitTestCase::getStringTranslationStub()...

Issue #2778673 by neclimdul: UnitTestCase::getStringTranslationStub() incorrectly documents its return type

core/tests/Drupal/Tests/UnitTestCase.php

@@ -200,8 +200,8 @@ protected function getBlockMockWithMachineName($machine_name) {
   /**
    * Returns a stub translation manager that just returns the passed string.
    *
-   * @return \PHPUnit_Framework_MockObject_MockBuilder
-   *   A MockBuilder of \Drupal\Core\StringTranslation\TranslationInterface
+   * @return \PHPUnit_Framework_MockObject_MockObject|\Drupal\Core\StringTranslation\TranslationInterface
+   *   A mock translation object.
    */
   public function getStringTranslationStub() {
     $translation = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');