Fix panic message when `RangeFrom` index is out of bounds#74510

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bors merged 2 commits intorust-lang:masterfrom

LukasKalbertodt:fix-range-from-index-panic

Jul 25, 2020

Commits on Jul 19, 2020

Fix panic message when `RangeFrom` index is out of bounds
LukasKalbertodt
committed
Slightly improve panic messages when range indices are out of bounds
LukasKalbertodt
committed