diffs: fix broken comment in wrap_to_table

kallithea/lib/diffs.py

@@ -158,7 +158,7 b" def as_html(table_class='code-difftable'"
 
 def wrap_to_table(html):
     """Given a string with html, return it wrapped in a table, similar to what
-    DiffProcessor returns."""
+    as_html returns."""
     return '''\
               <table class="code-difftable">
                 <tr class="line">