Allow more recursion for list formatting in logpoints. Also make the formatting more consistent with Python.
Allow more recursion for list formatting in logpoints. Also make the formatting more consistent with Python.

In the course of fixing this, I also found and fixed an issue with the formatting of slice objects (they're primitives, and not enumerable).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=134851559

GoogleCloudPlatform/cloud-debug-python,GoogleCloudPlatform/cloud-debug-python,GoogleCloudPlatform/cloud-debug-python