Merge lp://qastaging/~rbalint/update-manager/fix-pep8-cosmic into lp://qastaging/update-manager

UpdateManager/ChangelogViewer.py (+2/-2)
UpdateManager/Core/MetaRelease.py (+4/-4)
UpdateManager/Core/MyCache.py (+15/-15)
UpdateManager/Core/UpdateList.py (+15/-14)
UpdateManager/Core/utils.py (+1/-1)
UpdateManager/Dialogs.py (+2/-2)
UpdateManager/UpdateManager.py (+3/-3)
UpdateManager/UpdatesAvailable.py (+11/-11)
UpdateManager/backend/InstallBackendAptdaemon.py (+2/-2)
UpdateManager/backend/__init__.py (+10/-10)
debian/changelog (+13/-0)
debian/source_update-manager.py (+3/-3)
janitor/plugincore/manager.py (+6/-6)
janitor/plugincore/plugins/dpkg_status_plugin.py (+3/-3)
janitor/plugincore/plugins/kdelibs4to5_plugin.py (+2/-2)
janitor/plugincore/plugins/langpack_manual_plugin.py (+4/-4)
janitor/plugincore/tests/test_documentation.py (+4/-4)
tests/test_hwe_support_status.py (+5/-5)
tests/test_pep8.py (+1/-1)
tests/test_update_origin.py (+4/-4)
tests/test_utils.py (+2/-2)