Issue #2904084 by Ruslan P, Venkatesh Rajan.J: Confusing title for "Boolean"...

Issue #2904084 by Ruslan P, Venkatesh Rajan.J: Confusing title for "Boolean" field in "Manage form display"

core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/BooleanCheckboxWidget.php

@@ -35,7 +35,7 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $element['display_label'] = [
       '#type' => 'checkbox',
-      '#title' => t('Use field label instead of the "On label" as label'),
+      '#title' => t('Use field label instead of the "On" label as the label.'),
       '#default_value' => $this->getSetting('display_label'),
       '#weight' => -1,
     ];

core/modules/field/src/Tests/Boolean/BooleanFieldTest.php

@@ -153,7 +153,7 @@ public function testBooleanField() {
     $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
 
     $this->assertText(
-      'Use field label instead of the "On label" as label',
+      'Use field label instead of the "On" label as the label.',
       t('Display setting checkbox available.')
     );
 
@@ -169,7 +169,7 @@ public function testBooleanField() {
 
     $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
     $this->assertText(
-      'Use field label instead of the "On label" as label',
+      'Use field label instead of the "On" label as the label.',
       t('Display setting checkbox is available')
     );
     $this->assertFieldByXPath(