Reform is_power_of_two() to return false for self == 0, and move previous functionality to is_power_of_two_or_zero()#19640

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bors merged 1 commit intorust-lang:masterfrom

aliblong:power_of_two_reform

Dec 20, 2014

Commits on Dec 19, 2014

Reform power_of_two methods for perf increase & semantic change to consider 0 not a power of 2.
aliblong
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