All seems pretty normal to me, except for the warning on ++ but not on +=. I don't see where you show slices and pure lists working differently.

I think most of your trouble is with context. += and ++ give their operands scalar context, = only gives context to the right operand, based on what is on the left.

In reply to Re: Fringe case slice behavior by ysth
in thread Fringe case slice behavior by davido

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