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/native-storage/index.ts

@@ -43,7 +43,7 @@ export class NativeStorage extends IonicNativePlugin {
    * @returns {Promise<any>}
    */
   @Cordova()
-  setItem(reference: string, value: any): Promise<any> {return; }
+  setItem(reference: string, value: any): Promise<any> { return; }
 
   /**
    * Gets a stored item
@@ -51,7 +51,7 @@ export class NativeStorage extends IonicNativePlugin {
    * @returns {Promise<any>}
    */
   @Cordova()
-  getItem(reference: string): Promise<any> {return; }
+  getItem(reference: string): Promise<any> { return; }
 
   /**
    * Removes a single stored item
@@ -59,13 +59,13 @@ export class NativeStorage extends IonicNativePlugin {
    * @returns {Promise<any>}
    */
   @Cordova()
-  remove(reference: string): Promise<any> {return; }
+  remove(reference: string): Promise<any> { return; }
 
   /**
    * Removes all stored values.
    * @returns {Promise<any>}
    */
   @Cordova()
-  clear(): Promise<any> {return; }
+  clear(): Promise<any> { return; }
 
 }