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-rw-r--r--doc/tools/doc_merge.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/tools/doc_merge.py b/doc/tools/doc_merge.py
index 57ac4bdcdd..496d5dcb74 100644
--- a/doc/tools/doc_merge.py
+++ b/doc/tools/doc_merge.py
@@ -82,7 +82,7 @@ def find_signal_descr(old_class, name):
def find_constant_descr(old_class, name):
- if (old_class == None):
+ if (old_class is None):
return None
constants = old_class.find("constants")
if(constants != None and len(list(constants)) > 0):