TYP: ix_ shape-typing and fix for boolean input#31218
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TYP: ``ix_`` fix for boolean and non-1d input (#31218)
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Calling
np.ix_with N arrays returns an N-tuple of N-d arrays with same dtype as input, except in case ofbool, because that is upcasted toint_. This exception is what wasn't correct before, becauseboolinput were annotated to returnbooloutput.Since this boolean behavior is also mentioned in the docs, I'm thinking of partially backporting this.
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