Tests: improve and extend unit tests for Logfile
Tests: improve and extend unit tests for Logfile

ben-albrecht/cclib,berquist/cclib,ATenderholt/cclib,Schamnad/cclib,cclib/cclib,ghutchis/cclib,Schamnad/cclib,gaursagar/cclib,ATenderholt/cclib,ben-albrecht/cclib,ghutchis/cclib,berquist/cclib,berquist/cclib,cclib/cclib,andersx/cclib,langner/cclib,gaursagar/cclib,andersx/cclib,jchodera/cclib,langner/cclib,jchodera/cclib,cclib/cclib,langner/cclib