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-rw-r--r--sphinx/ext/inheritance_diagram.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/sphinx/ext/inheritance_diagram.py b/sphinx/ext/inheritance_diagram.py
index 6499e078..9d17e73e 100644
--- a/sphinx/ext/inheritance_diagram.py
+++ b/sphinx/ext/inheritance_diagram.py
@@ -250,6 +250,7 @@ class InheritanceGraph(object):
if cls.__doc__:
doc = cls.__doc__.strip().split("\n")[0]
if doc:
+ doc = doc.replace('"', '\"')
this_node_attrs['tooltip'] = '"%s"' % doc
res.append(' "%s" [%s];\n' %
(name, self._format_node_attrs(this_node_attrs)))