Improve output format of Carpet timer trees

[Erik Schnetter]

Marek Blazewicz reports:

I was using the timer tree in Carpet. Because it was not too nicely outputted, and I had to format it manually each time, I've fixed it ;).

Keyword:

[Frank Löffler]

Please apply

[Erik Schnetter]

Marek says:

First for "untimed", the precision was 1, always. I unified it with other lines.

Secondly I've changed the width of the column float field (duration in s.) to the maximal printed length. These are # digits before decimal sep. (.) + 1 for dec. sep. + precision. The length of the field is computed once (log10(total time (which I assume is the largest number))) and passed to children via recurrence, to avoid unnecessary computations.

For '%' of total time I've used constant equation: 3 (log(100) + 1) + 1 + precision.

Thanks to these changes the time tree looks like tree ;)

[Frank Löffler]

The patch no longer applies, and since the output format seems to have changed in the meantime, there is no quick way to see how to merge.