Fix math-only footnotes

papers/00_vanderwalt/00_vanderwalt.rst

@@ -108,7 +108,6 @@ or on multiple, aligned lines:
    g(x) &=& \int_0^\infty f(x) dx \\
         &=& \ldots
 
-
 The area of a circle and volume of a sphere are given as
 
 .. math::
@@ -224,10 +223,11 @@ won't work try raw LaTeX:
 
    \end{table*}
 
-Perhaps we want to end off with a quote by Lao Tse:
+Perhaps we want to end off with a quote by Lao Tse [#]_:
 
   *Muddy water, let stand, becomes clear.*
 
+.. [#] :math:`\mathrm{e^{-i\pi}}`
 
 .. Customised LaTeX packages
 .. -------------------------

publisher/writer/__init__.py

@@ -298,6 +298,10 @@ def visit_image(self, node):
                                                          filename))
 
     def visit_footnote(self, node):
+        # Handle case where footnote consists only of math
+        if len(node.astext().split()) < 2:
+            node.append(nodes.label(text='_abcdefghijklmno_'))
+
         # Work-around for a bug in docutils where
         # "%" is prepended to footnote text
         LaTeXTranslator.visit_footnote(self, node)