MAINT: Remove spaces from log files prefix
MAINT: Remove spaces from log files prefix

Having them in place make autocompletion/usage in a shell session
annoying.

ElDeveloper/american-gut-web,adamrp/american-gut-web,biocore/american-gut-web,ElDeveloper/american-gut-web,squirrelo/american-gut-web,biocore/american-gut-web,PersonalGenomesOrg/american-gut-web,adamrp/american-gut-web,josenavas/american-gut-web,ElDeveloper/american-gut-web,mortonjt/american-gut-web,biocore/american-gut-web,josenavas/american-gut-web,mortonjt/american-gut-web,squirrelo/american-gut-web,josenavas/american-gut-web,mortonjt/american-gut-web,PersonalGenomesOrg/american-gut-web,adamrp/american-gut-web,PersonalGenomesOrg/american-gut-web,squirrelo/american-gut-web