diff --git a/kallithea/lib/helpers.py b/kallithea/lib/helpers.py
--- a/kallithea/lib/helpers.py
+++ b/kallithea/lib/helpers.py
@@ -1062,6 +1062,8 @@ def urlify_text(s, repo_name=None, link_
     URLs links to what they say.
     Issues are linked to given issue-server.
     If link_ is provided, all text not already linking somewhere will link there.
+    >>> urlify_text("Urlify http://example.com/ and 'https://example.com' *and* <b>markup/b>")
+    literal('Urlify <a href="http://example.com/">http://example.com/</a> and &#39;<a href="https://example.com&apos">https://example.com&apos</a>; <b>*and*</b> &lt;b&gt;markup/b&gt;')
     """
 
     def _replace(match_obj):
diff --git a/kallithea/lib/markup_renderer.py b/kallithea/lib/markup_renderer.py
--- a/kallithea/lib/markup_renderer.py
+++ b/kallithea/lib/markup_renderer.py
@@ -150,6 +150,10 @@ class MarkupRenderer(object):
 
     @classmethod
     def plain(cls, source, universal_newline=True):
+        """
+        >>> MarkupRenderer.plain('https://example.com/')
+        '<br /><a href="https://example.com/">https://example.com/</a>'
+        """
         source = safe_str(source)
         if universal_newline:
             newline = '\n'