chore: readme - custom attributes

Author: AidasK

README.md

@@ -137,9 +137,10 @@ parameter must be adjusted together with `progressCallbacksInterval` parameter.
   * `isDirectory` Pass in `true` to allow directories to be selected (Chrome only, support can be checked with `supportDirectory` property).
   * `singleFile` To prevent multiple file uploads set this to true. Also look at config parameter `singleFile`.
   * `attributes` Pass object of keys and values to set custom attributes on input fields.
-  For example, you can set `accept` attribute to `image/*`. This means that user will be able to select only images.
-  Full list of attributes: http://www.w3.org/TR/html-markup/input.file.html#input.file-attributes
-Note: avoid using `a` and `button` tags as file upload buttons, use span instead.
+   For example, you can set `accept` attribute to `image/*`. This means that user will be able to select only images.
+   Full list of attributes: http://www.w3.org/TR/html-markup/input.file.html#input.file-attributes
+
+   Note: avoid using `a` and `button` tags as file upload buttons, use span instead.
 * `.assignDrop(domNodes)` Assign one or more DOM nodes as a drop target.
 * `.on(event, callback)` Listen for event from Flow.js (see below)
 * `.off([event, [callback]])`: