added doc comments to all formatters

html_to_django/formatters/static_formatter.py

@@ -1,3 +1,16 @@
+"""
+static_formatter.py
+
+This module contains a function `format` that modifies a BeautifulSoup object in place.
+The function searches for all elements with the attribute "dj-static". The value of "dj-static" is expected to be a
+string representing a tag and a static file path separated by a semicolon. For each found element, it replaces the value
+of the specified tag with a Django template static command, using the specified static file path.
+Then it removes the "dj-static" attribute from the element.
+
+Example:
+    If an element is <img dj-static="src;images/pic.jpg">,
+    after processing, it becomes <img src="{% static 'images/pic.jpg' %}">.
+"""
 from bs4 import BeautifulSoup