The `profile` output for awk is hard to parse

[lars-t-hansen]

The output of profile is a timeline along the y axis with a field per process in the job along the x axis. If a process is not active at a given time then nothing is printed (empty field). For csv we thus get yyyy-mm-hh hh:mm,,,x,y,,, and so on. But for awk, where the fields are space-separated, we get a bunch of spaces. As a special case, awk interprets a field separator of a single space as "any string of whitespace" (https://www.gnu.org/software/gawk/manual/gawk.html#Whitespace-Normally-Separates-Fields). Therefore, for awk output in the profile we should probably print something, eg, '.' would be fine.