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travis-ci

Print at least three significant digits for times. (#701)

Some benchmarks are particularly sensitive and they run in less than
a nanosecond. In order for the console reporter to provide meaningful
output for such benchmarks it needs to be able to display the times
using more resolution than a single nanosecond.

This patch changes the console reporter to print at least three
significant digits for all results.

Unlike the initial attempt, this patch does not align the decimal point.

12 of 12 new or added lines in 1 file covered. (100.0%)

1638 of 1832 relevant lines covered (89.41%)

4907914.19 hits per line