* importing the pull request #270 change to stable: Non-ASCII docstring cause UnicodeDecodeError when uses with inheritance-diagram directive. Thanks to WAKAYAMA shirou. Closes #1533

--HG--
branch : stable
extra : amend_source : 116b7ec3f723dad4173ebb90a6fe3332dd2b4a70
ues sphinx.util.force_decode if doc is not unicode.

--HG--
branch : stable
merge with stable