Fix language tags in doc-snippets

The doc-snippets were inconsistent
(no spaces before title, small-caps, JS
instead of JavaScript, etc.)

apps/tests/Readme.md

@@ -1,7 +1,7 @@
 To run tests please build using one of the *_Tests build configurations and call runAll() method of the Tests module. For example:
 
 ##iOS
-```js
+``` JavaScript
 var app = require("application");
 app.init(null);
 var tests = require("Tests");
@@ -9,7 +9,7 @@ tests.runAll();
 ```
 
 ##Android
-```js
+``` JavaScript
 app.init({
 	getActivity: function(intent) {
 		return com.tns.NativeScriptActivity.extend({});

apps/tests/fetch-tests.ts

@@ -107,7 +107,7 @@ export var test_fetch_response_status = function (done) {
 
     // <snippet module="fetch" title="fetch">
     // ### Get Response status
-    // ``` fetch
+    // ``` JavaScript
     fetch("https://httpbin.org/get").then(function (response) {
         //// Argument (response) is Response!
         var statusCode = response.status;

apps/tests/ui/list-view/list-view-tests.ts

@@ -45,7 +45,7 @@ import labelModule = require("ui/label");
 //  {%raw%}<ListView items="{{ myItems }}" loadMoreItems="listViewLoadMoreItems" />{%endraw%}
 // </Page>
 //```
-//```JS
+//``` JavaScript
 // function listViewLoadMoreItems(args) {
 //   // Expand your collection bound to the ListView with more items here!
 // }

apps/tests/ui/placeholder/placeholder-tests.ts

@@ -17,7 +17,7 @@ import placeholderModule = require("ui/placeholder");
 //   {%raw%}<Placeholder creatingView="creatingView" />{%endraw%}
 // </Page>
 //```
-//```JS
+//``` JavaScript
 //var platform = require("platform");
 //var utils = require("utils/utils");
 //

apps/tests/ui/progress/progress-tests.ts

@@ -18,7 +18,7 @@ import progressModule = require("ui/progress");
 //   {%raw%}<Progress value="{{ someProperty }}" />{%endraw%}
 // </Page>
 //```
-//```JS
+//``` JavaScript
 // function pageLoaded(args) {
 //   var page = args.object;
 //   page.bindingContext = { someProperty : 42 };

apps/tests/ui/segmented-bar/segmented-bar-tests.ts

@@ -21,7 +21,7 @@ function _createSegmentedBar(): segmentedBarModule.SegmentedBar {
     // ``` JavaScript
     var segmentedBar = new segmentedBarModule.SegmentedBar();
     // ```
-    // ``` xml
+    // ``` XML
     // <SegmentedBar>
     //   <SegmentedBar.items>
     //     <SegmentedBarItem title="Item 1" />

apps/tests/ui/slider/slider-tests.ts

@@ -23,7 +23,7 @@ import sliderModule = require("ui/slider");
 //  </StackLayout>
 // </Page>
 //```
-//```JS
+//``` JavaScript
 // function pageLoaded(args) {
 //   var page = args.object;
 //   var obj = new observable.Observable();

apps/tests/ui/switch/switch-tests.ts

@@ -21,7 +21,7 @@ import switchModule = require("ui/switch");
 //  </StackLayout>
 // </Page>
 //```
-//```JS
+//``` JavaScript
 // function pageLoaded(args) {
 //   var page = args.object;
 //   var obj = new observable.Observable();

apps/tests/ui/text-field/text-field-tests.ts

@@ -29,7 +29,7 @@ import observable = require("data/observable");
 //  </StackLayout>
 // </Page>
 //```
-//```JS
+//``` JavaScript
 // function pageLoaded(args) {
 //   var page = args.object;
 //   var obj = new observable.Observable();

apps/tests/ui/text-view/text-view-tests.ts

@@ -29,7 +29,7 @@ import observable = require("data/observable");
 //  </StackLayout>
 // </Page>
 //```
-//```JS
+//``` JavaScript
 // function pageLoaded(args) {
 //   var page = args.object;
 //   var obj = new observable.Observable();