remove superfluous leading/trailing whitespace (#181)

tests/utils.py

@@ -0,0 +1,9 @@
+from markdownify import MarkdownConverter
+
+
+# for unit testing, disable document-level stripping by default so that
+# separation newlines are included in testing
+def md(html, **options):
+    options = {"strip_document": None, **options}
+
+    return MarkdownConverter(**options).convert(html)