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-rw-r--r--markdown/__init__.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/markdown/__init__.py b/markdown/__init__.py
index 0219dc3..4943388 100644
--- a/markdown/__init__.py
+++ b/markdown/__init__.py
@@ -293,7 +293,7 @@ class Markdown(object):
# Run the tree-processors
for treeprocessor in self.treeprocessors.values():
newRoot = treeprocessor.run(root)
- if newRoot:
+ if newRoot is not None:
root = newRoot
# Serialize _properly_. Strip top-level tags.