Make make check happy.

Makefile

@@ -9,7 +9,8 @@ all: clean-pyc check test
 check:
 	@$(PYTHON) utils/check_sources.py -i build -i dist -i sphinx/style/jquery.js \
 		-i sphinx/pycode/pgen2 -i sphinx/util/smartypants.py -i .ropeproject \
-		-i doc/_build -i ez_setup.py -i tests/path.py -i tests/coverage.py -i env .
+		-i doc/_build -i ez_setup.py -i tests/path.py -i tests/coverage.py \
+		-i env -i .tox .
 
 clean: clean-pyc clean-patchfiles
 

sphinx/util/docfields.py

@@ -223,7 +223,8 @@ class DocFieldTransformer(object):
                 # filter out only inline nodes; others will result in invalid
                 # markup being written out
                 content = filter(
-                    lambda n: isinstance(n, nodes.Inline) or isinstance(n, nodes.Text),
+                    lambda n: isinstance(n, nodes.Inline) or
+                              isinstance(n, nodes.Text),
                     content)
                 if content:
                     types.setdefault(typename, {})[fieldarg] = content