Comment 2 for bug 1680599

Same error with 0.90ubuntu0.5 on Ubuntu 16.04

# unattended-upgrades --debug --dry-run
Initial blacklisted packages:
Initial whitelisted packages:
Starting unattended upgrades script
Allowed origins are: ['o=Ubuntu,a=xenial-security', 'o=Ubuntu,a=xenial-updates', 'o=Ubuntu,a=xenial', 'o=packagecloud.io/slacktechnologies/slack', 'o=Google, Inc.', 'o=Node Source,n=xenial']
Traceback (most recent call last):
  File "/usr/bin/unattended-upgrades", line 1473, in <module>
    main(options)
  File "/usr/bin/unattended-upgrades", line 1198, in main
    allowed_origins=allowed_origins)
  File "/usr/bin/unattended-upgrades", line 105, in __init__
    self.adjust_candidate_versions()
  File "/usr/bin/unattended-upgrades", line 126, in adjust_candidate_versions
    if is_allowed_origin(pkg.candidate, self.allowed_origins):
  File "/usr/bin/unattended-upgrades", line 512, in is_allowed_origin
    if match_whitelist_string(allowed, origin):
  File "/usr/bin/unattended-upgrades", line 363, in match_whitelist_string
    for s in token.split("=")]
ValueError: not enough values to unpack (expected 2, got 1)