Add newlines and backticks

docs/api/frameless-window.md

@@ -27,7 +27,9 @@ both the titlebar and window controls, you may want to have the title bar
 hidden and your content extend to the full window size, yet still preserve
 the window controls ("traffic lights") for standard window actions.
 You can do so by specifying the new `titleBarStyle` option:
-#### Hidden
+
+#### `hidden`
+
 Results in a hidden title bar and a full size content window, yet the title bar still has the standard window controls (“traffic lights”) in the top left.
 
 ```javascript
@@ -35,7 +37,9 @@ const {BrowserWindow} = require('electron')
 let win = new BrowserWindow({titleBarStyle: 'hidden'})
 win.show()
 ```
-#### Hidden-inset
+
+#### `hidden-inset`
+
 Results in a hidden title bar with an alternative look where the traffic light buttons are slightly more inset from the window edge.
 
 ```javascript