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rails: strip insignificant zeros
= number_with_precision(3.50, strip_insignificant_zeros: true, precision: 2)
3.5
= number_with_precision(3.0, strip_insignificant_zeros: true, precision: 2)
3
= number_with_precision(4.02, strip_insignificant_zeros: true, precision: 2)
4.02