Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/epy/help.html b/docs/epy/help.html
index 974f55c..65ae89f 100644
--- a/docs/epy/help.html
+++ b/docs/epy/help.html
@@ -246,7 +246,7 @@
 <table border="0" cellpadding="0" cellspacing="0" width="100%%">
   <tr>
     <td align="left" class="footer">
-    Generated by Epydoc 3.0.1 on Fri Jun 14 13:09:01 2019
+    Generated by Epydoc 3.0.1 on Fri Jun 14 15:57:27 2019
     </td>
     <td align="right" class="footer">
       <a target="mainFrame" href="http://epydoc.sourceforge.net"