Issue #3154914 by ju.vanderw: Fix grammar usage of singular/plural

(cherry picked from commit b8eac3f2)

core/modules/system/tests/src/Functional/ParamConverter/UpcastingTest.php

@@ -26,7 +26,7 @@ class UpcastingTest extends BrowserTestBase {
    * signature: f($user, $node, $foo) returning either values or labels
    * like "user: Dries, node: First post, foo: bar"
    *
-   * The tests shuffle the parameters around an checks if the right thing is
+   * The test shuffles the parameters around and checks if the right thing is
    * happening.
    */
   public function testUpcasting() {

core/modules/views/src/Form/ViewsExposedForm.php

@@ -101,7 +101,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           // Grouped exposed filters have their own forms.
           // Instead of render the standard exposed form, a new Select or
           // Radio form field is rendered with the available groups.
-          // When an user choose an option the selected value is split
+          // When an user chooses an option the selected value is split
           // into the operator and value that the item represents.
           if ($handler->isAGroup()) {
             $handler->groupForm($form, $form_state);