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/themeable-browser/index.ts

@@ -87,13 +87,13 @@ export class ThemeableBrowserObject {
    * Displays an browser window that was opened hidden. Calling this has no effect
    * if the browser was already visible.
    */
-  @CordovaInstance({sync: true})
+  @CordovaInstance({ sync: true })
   show(): void { }
 
   /**
    * Closes the browser window.
    */
-  @CordovaInstance({sync: true})
+  @CordovaInstance({ sync: true })
   close(): void { }
 
   /**
@@ -108,7 +108,7 @@ export class ThemeableBrowserObject {
    * @returns {Promise<any>}
    */
   @CordovaInstance()
-  executeScript(script: {file?: string, code?: string}): Promise<any> {return; }
+  executeScript(script: { file?: string, code?: string }): Promise<any> { return; }
 
   /**
    * Injects CSS into the browser window.
@@ -116,7 +116,7 @@ export class ThemeableBrowserObject {
    * @returns {Promise<any>}
    */
   @CordovaInstance()
-  insertCss(css: {file?: string, code?: string}): Promise<any> {return; }
+  insertCss(css: { file?: string, code?: string }): Promise<any> { return; }
 
   /**
    * A method that allows you to listen to events happening in the browser.
@@ -140,7 +140,7 @@ export class ThemeableBrowserObject {
  * In-app browser that allows styling.
  *
  * @usage
- * ```
+ * ```typescript
  * import { ThemeableBrowser, ThemeableBrowserOptions, ThemeableBrowserObject } from '@ionic-native/themeable-browser';
  *
  * constructor(private themeableBrowser: ThemeableBrowser) { }