DOCTEST: Use texext 0.3

Author: effigies

.travis.yml

@@ -107,7 +107,7 @@ script:
       COVER_ARGS="--with-coverage --cover-package nibabel";
       fi
     - if [ "$DOC_DOC_TEST" == "1" ]; then
-      pip install sphinx numpydoc;
+      pip install sphinx numpydoc texext;
       cd ../doc;
       make html;
       make doctest;

doc/source/conf.py

@@ -29,6 +29,10 @@
     import numpydoc
 except ImportError:
     raise RuntimeError('Need to install "numpydoc" package for doc build')
+try:
+    import texext
+except ImportError:
+    raise RuntimeError('Need to install "texext" package for doc build')
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -55,7 +59,7 @@
               'sphinx.ext.mathjax',
               'sphinx.ext.inheritance_diagram',
               'sphinx.ext.autosummary',
-              'math_dollar',  # has to go before numpydoc
+              'texext.math_dollar',  # has to go before numpydoc
               'numpydoc',
               'only_directives',
               'plot_directive',