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/geolocation/index.ts

@@ -74,7 +74,7 @@ export interface PositionError {
   /**
    * A message that can describe the error that occurred
    */
-   message: string;
+  message: string;
 
 }