Process nested content files in addition to the primary one.

Thanks to @dudanogueira for the report and initial patch.

Author: alexmorozov

templated_docs/__init__.py

@@ -97,7 +97,7 @@ def fill_template(template_name, context, output_format='odt'):
     manifest_data = ''
     for name in source.namelist():
         data = smart_str(source.read(name))
-        if name in ('content.xml', 'styles.xml'):
+        if any(name.endswith(file) for file in ('content.xml', 'styles.xml')):
             template = Template(fix_inline_tags(data))
             data = template.render(context)
         elif name == 'META-INF/manifest.xml':