add test, update tags, update description

snippets/serializeForm.md

@@ -1,6 +1,6 @@
 ### serializeForm
 
-Serializes a form into an object.
+Encode a set of form elements as a query string.
 
 First we transform the `form` into `FormData`, then we convert it into an `array` and from the `array` we collect an `query string`
 
@@ -9,13 +9,6 @@ const serializeForm = form =>
   Array.from(new FormData(form), field => field.map(encodeURIComponent).join('=')).join('&')
 ```
 
-```html
-<form id="form">
-  <input name="email" type="email" />
-  <input name="name" />
-</form>
-```
-
 ```js
 serializeForm(document.querySelector('#form')) // email=test%40email.com&name=Test%20Name
 ```