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@@ -28,6 +28,7 @@ don't have test cases for.
- When subclassing the BitcoinTestFramwork, place overrides for the
`set_test_params()`, `add_options()` and `setup_xxxx()` methods at the top of
the subclass, then locally-defined helper methods, then the `run_test()` method.
+- Use `'{}'.format(x)` for string formatting, not `'%s' % x`.
#### Naming guidelines