are all uses of hex, oct, repr.
mostly DONE apart from instances which we're not sure we need anyway
- - (easy) list methods reverse, pop, insert, index(?)
- task: only left: remove the single index() call in PyPy (typeobject.py)
+ - DONE (easy) list methods reverse, pop, insert, index(!)
+ task: do it. also support contains
- (easy) tuple concatenation