tests: use prettified snapshot for HTML

tests/utils/test.py

@@ -11,6 +11,7 @@
 import openpyxl
 import sqlparse
 from bs4 import BeautifulSoup
+from bs4.formatter import HTMLFormatter
 from django.conf import Path, settings
 from django.db import DEFAULT_DB_ALIAS, connections
 from django.db.backends.utils import CursorDebugWrapper
@@ -38,6 +39,10 @@
 }
 
 
+def pretty_indented(soup, indent=4):
+    return soup.prettify(formatter=HTMLFormatter(indent=indent))
+
+
 def pprint_html(response, **selectors):
     """
     Pretty-print HTML responses (or fragment selected with :arg:`selector`)