[sys.monitoring] safe repr - collections

[int19h]

Implementing safe-repr for standard Python collections. The output should follow the standard repr() output for them while intelligently using ellipsis to exclude enough parts to fit within the specified length limits. It should also safely handle recursive collections (those that directly or indirectly include themselves as items).

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1. tuple
2. list
3. set
4. dict
5. array
6. frozenset
7. collections.deque
8. collections.namedtuple
9. collections.*
10. namedtuple

[judej]

shelving work for sys.monitoring implmentation for now