Test repositories.py

[StanFromIreland]

Also, fix warnings:

repositories.py:20: PendingDeprecationWarning: nodes.Node.traverse() is obsoleted by Node.findall().
  for node in doctree.traverse(table):
repositories.py:21: PendingDeprecationWarning: nodes.Node.traverse() is obsoleted by Node.findall().
  for row_node in node.traverse(row)[1:]:

And ignore docutils errors when it encounters Sphinx directives.

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