Only insert links to pdfs if we are actually generating these. This should

jenshnielsen · jenshnielsen · commit 301fa0a8fb87 · 2014-09-17T22:09:55.000+01:00
silence most warnings in the html only small build on travis
diff --git a/lib/matplotlib/sphinxext/plot_directive.py b/lib/matplotlib/sphinxext/plot_directive.py
@@ -383,7 +383,9 @@ def remove_coding(text):
 {{ only_latex }}
 
    {% for img in images %}
+   {% if 'pdf' in img.formats -%}
    .. image:: {{ build_dir }}/{{ img.basename }}.pdf
+   {% endif -%}
    {% endfor %}
 
 {{ only_texinfo }}
