[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

python/taichi/lang/ast/ast_transformer.py

@@ -218,7 +218,7 @@ def build_assign_basic(ctx, target, value, is_static_assign):
                 except AttributeError:
                     raise TaichiSyntaxError(
                         f"Variable '{unparse(target).strip()}' cannot be assigned. Maybe it is not a Taichi object?"
-                )
+                    )
         return var
 
     @staticmethod