REF: merge.py check for known arraylikes #53041
Merged
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#48454 was going to do this as a deprecation, but before that got merged another PR accidentally made most weird-arraylikes raise (making it difficult to write a test for the deprecation). We agreed to wait a while to see if anyone complained about that, then to change over the checks explicitly. Among other things this will make the existing AnyArrayLike annotations in this file accurate.