soc/integration/doc: replace "== None" by "is None"

diff --git a/litex/soc/integration/doc.py b/litex/soc/integration/doc.py
index 6477cc1bcbc357a156bba2102f005fc7ae98354e..6b360dc5aab954fed3dacb5121a099bcd14254a8 100644 (file)
--- a/litex/soc/integration/doc.py
+++ b/litex/soc/integration/doc.py
@@ -64,7 +64,7 @@ class ModuleDoc(DUID):
         self._title = title\r
         self._format = format\r
 \r
-        if file == None and body == None and self.__doc__ is None:\r
+        if file is None and body is None and self.__doc__ is None:\r
             raise ValueError("Must specify `file` or `body` when constructing a ModuleDoc()")\r
         if file is not None:\r
             if not os.path.isabs(file):\r