Add separate platform examples for running electron

docs/tutorial/quick-start.md

@@ -169,8 +169,16 @@ electron .
 
 If you've installed it locally, then run:
 
+#### macOS / Linux
+
+```bash
+$ ./node_modules/.bin/electron .
+```
+
+#### Windows
+
 ```bash
-"./node_modules/.bin/electron" .
+$ .\node_modules\.bin\electron .
 ```
 
 ### Manually Downloaded Electron Binary