Issue #2646962 by walangitan, klidifia: AjaxPageStateTest typo and test cleanup

core/modules/system/src/Tests/Render/AjaxPageStateTest.php

@@ -48,7 +48,7 @@ public function testLibrariesAvailable() {
     );
     $this->assertRaw(
       '/core/misc/drupalSettingsLoader.js',
-      'The Dupalsettings library from core should be loaded.'
+      'The drupalSettings library from core should be loaded.'
     );
   }
 
@@ -78,7 +78,7 @@ public function testHtml5ShivIsNotLoaded() {
 
     $this->assertRaw(
       '/core/misc/drupalSettingsLoader.js',
-      'The Dupalsettings library from core should be loaded.'
+      'The drupalSettings library from core should be loaded.'
     );
   }
 
@@ -107,7 +107,7 @@ public function testMultipleLibrariesAreNotLoaded() {
 
     $this->assertNoRaw(
       '/core/misc/drupalSettingsLoader.js',
-      'The Dupalsettings library from core should be excluded from loading.'
+      'The drupalSettings library from core should be excluded from loading.'
     );
   }
 }