added doc comments to all formatters

html_to_django/formatters/unwrap_formatter.py

@@ -1,3 +1,15 @@
+"""
+unwrap_formatter.py
+
+This module contains a function `format` that modifies a BeautifulSoup object in place.
+
+The `format` function searches for all elements with the attribute "dj-unwrap". For each found element, it removes the
+element's tags but keeps its content.
+
+Example:
+    If an element is <div dj-unwrap><p>Hello, world!</p></div>,
+    after processing, it becomes <p>Hello, world!</p>.
+"""
 from bs4 import BeautifulSoup