Fix skew in hash computation #19
                
     Merged
            
            
          
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This fixes #18 by introducing a better implementation of
Hashwhich improves the added tests such that neither has any collisions. Previously, the whole number test had~50%unique hash codes, and the fractional test had~80%unique hash codes.Also, my
auto-rustfmtkicked in on a few lines, hence the unrelated whitespace changes.