If I swap the T with a space in this timestamp convention, parsing works - can this format with T be supported?
cat test1.txt
2020-09-27T00:00:03.766699+00:00 hostxxxxx su: pam_unix(su:session): session closed for user yyyy
petit --sgraph ./test1.txt
Cannot parse values on line: 0
cat test2.txt
2020-09-27 00:00:03.766699+00:00 hostxxxxx su: pam_unix(su:session): session closed for user yyyy
petit --sgraph ./test2.txt
############################################################
01 31 00
Start Time: 1900-01-01 01:01:01 Minimum Value: 0
End Time: 1900-01-01 01:02:00 Maximum Value: 1
Duration: 60 seconds Scale: 0.166666666667