I added the missing test.

Maybe this is cultural difference. I wanted to create a human readable format, and in normal communications from person to person, I say that the build took 1 day and 1 second and never "1 day, 0 hours, 0 minute and 1second".

This code is is not used in this branch so we can get rid of it.

As discussed with Dusting I will implement the start/end description interpolation in another branch.

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Let me know if you want me to remove this code.