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/base64-to-gallery/index.ts

@@ -40,7 +40,7 @@ export class Base64ToGallery extends IonicNativePlugin {
     successIndex: 2,
     errorIndex: 3
   })
-  base64ToGallery(data: string, options?: {prefix?: string; mediaScanner?: boolean}): Promise<any> {
+  base64ToGallery(data: string, options?: { prefix?: string; mediaScanner?: boolean }): Promise<any> {
     return;
   }