Make gen_op_registration flake8 compliant (#47604)

Summary:
Fixes regression introduced by D24686838 (8182558)

Pull Request resolved: #47604

Reviewed By: walterddr

Differential Revision: D24832687

Pulled By: malfet

fbshipit-source-id: e9f7a35561c2b1705e11fd11abe402e3c83cf5cc

tools/code_analyzer/gen_op_registration_allowlist.py

@@ -38,7 +38,7 @@ def load_root_ops(fname):
     return result
 
 
-def gen_transitive_closure(dep_graph, root_ops, train = False):
+def gen_transitive_closure(dep_graph, root_ops, train=False):
     result = set(root_ops)
     queue = root_ops[:]