📝 Fix coding style issues

* Adjust line length to `80`
* Normalize whitespaces

[ci skip]

docs/development/coding-style.md

@@ -45,8 +45,10 @@ Electron APIs uses the same capitalization scheme as Node.js:
 
 - When the module itself is a class like `BrowserWindow`, use `CamelCase`.
 - When the module is a set of APIs, like `globalShortcut`, use `mixedCase`.
-- When the API is a property of object, and it is complex enough to be in a separate chapter like `win.webContents`, use `mixedCase`.
-- For other non-module APIs, use natural titles, like `<webview> Tag` or `Process Object`.
+- When the API is a property of object, and it is complex enough to be in a
+  separate chapter like `win.webContents`, use `mixedCase`.
+- For other non-module APIs, use natural titles, like `<webview> Tag` or
+  `Process Object`.
 
 When creating a new API, it is preferred to use getters and setters instead of
 jQuery's one-function style. For example, `.getText()` and `.setText(text)`