[BugFix] Change is_diff check to use is_diff.any()

[pancan21]

Description

Previous implementation using list of boolean values resulted in ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

I assume using any() instead of all() is the intended behavior.

Motivation and Context

Why is this change required? ValueError when setting td.set_at_()
close #1476

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Not sure how this logical error should be tested. Please help

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