Snowhite

According to the official [docs](https://docs.python.org/3/library/unittest.html#deprecated-aliases), the aliases `failUnless` and `failIf` are deprecated since 3.1. Thus replace them to their original names.

Returning view of method list to avoid CME

3

The modified method `getMethodsByNameAndParamCount` is used (and only used) in the `FastHierarchy.getSignaturePolymorphicMethod` for resolving polymorphic methods. The for-loop will return the method list's iterator, but the list itself can be...

Possibly unmatched examples in StaticSingleAssignmentFormer's documentation

1

In the examples of [StaticSingleAssignmentFormer](https://github.com/soot-oss/SootUp/blob/develop/docs/advanced-topics.md#staticsingleassignmentformer), the Jimple/SSA code seems not matched the corresponding block graphs. Concretely, in left side, `label2` immediately follows `label3`; as for the graphs, `label2` follows the...