style(): unify docs and spacing (#1448)

* typo(barcode-scanner): fixe circle lint error

* typo(docs):  Unified the documentations

In some plugins the typescript markup was missing.
I also unified the console.log string from console.log("hello") to console.log('Hello') so any plugin page look the same.

src/@ionic-native/plugins/gyroscope/index.ts

@@ -43,7 +43,7 @@ export interface GyroscopeOptions {
  * @name Gyroscope
  * @description Read Gyroscope sensor data
  * @usage
- * ```
+ * ```typescript
  * import { Gyroscope, GyroscopeOrientation, GyroscopeOptions } from '@ionic-native/gyroscope';
  *
  *
@@ -89,7 +89,7 @@ export class Gyroscope extends IonicNativePlugin {
    * @return {Observable<GyroscopeOrientation>} Returns an Observable that resolves GyroscopeOrientation
    */
   watch(options?: GyroscopeOptions): Observable<GyroscopeOrientation> {
-    return new Observable<GyroscopeOrientation> (
+    return new Observable<GyroscopeOrientation>(
       (observer: any) => {
         let watchId = navigator.gyroscope.watch(observer.next.bind(observer), observer.next.bind(observer), options);
         return () => navigator.gyroscope.clearWatch(watchId);