Fix typos

src/background.js

@@ -2,15 +2,13 @@
 
 chrome.app.runtime.onLaunched.addListener(function() {
 
-    chrome.runtime.getPlatformInfo(function() {
-        // open chrome app in new window
-        chrome.app.window.create('index.html', {
-            id: '0',
-            innerBounds: {
-                width: 1280,
-                height: 800
-            }
-        });
+    // open chrome app in new window
+    chrome.app.window.create('index.html', {
+        id: '0',
+        innerBounds: {
+            width: 1280,
+            height: 800
+        }
     });
 
 });

src/index.html

@@ -29,7 +29,7 @@
 
     <!-- theme color -->
     <meta name="theme-color" content="#00c6ff">
-    <!-- standard web ap manifest -->
+    <!-- standard web app manifest -->
     <link rel="manifest" href="webapp.json">
 
     <!-- Viewport and styles -->