Given that this entry appears in the sources.list file when it is being examined, it must have been added fairly early.
2015-10-30 09:18:14,157 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu vivid main' 2015-10-30 09:18:14,158 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu wily main' updated to new dist 2015-10-30 09:18:14,158 DEBUG examining: 'deb-src http://mirror.mcs.anl.gov/ubuntu vivid-security main restricted universe multiverse'
Given that this entry appears in the sources.list file when it is being examined, it must have been added fairly early.
2015-10-30 09:18:14,157 DEBUG examining: 'deb http:// archive. ubuntu. com/ubuntu vivid main' archive. ubuntu. com/ubuntu wily main' updated to new dist mirror. mcs.anl. gov/ubuntu vivid-security main restricted universe multiverse'
2015-10-30 09:18:14,158 DEBUG entry 'deb http://
2015-10-30 09:18:14,158 DEBUG examining: 'deb-src http://