Cleanup: comparisons with None

utils/blender_merge_format_changes.py

@@ -32,7 +32,7 @@ if len(sys.argv) >= 2:
         if sys.argv[2] == '--base_branch':
             base_branch = sys.argv[3]
 
-if mode == None:
+if mode is None:
     print("Merge or rebase Blender master (or another base branch) into a branch in 3 steps,")
     print("to automatically merge clang-format changes.")
     print("")

utils/cycles_timeit.py

@@ -149,7 +149,7 @@ def benchmarkFile(blender, blendfile, stats):
     pipeline_render_time = "N/A"
     while True:
         line = process.stdout.readline()
-        if line == b"" and process.poll() != None:
+        if line == b"" and process.poll() is not None:
             break
         line = line.decode().strip()
         if line == "":