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When comparing unequal
rangeobjects, pytest can show a full diff of theirrange(...)representations. This adds noise without making the mismatch any clearer.This change skips that diff while preserving the useful sequence comparison output: the first differing index, or an extra-item summary when one range extends the other.
The shared-prefix check examines at most two items. A range's start and step determine its values, so that's enough to compare the prefix without walking through huge ranges.
Closes #6772.