tp_base_contact_list_one_contact_groups_changed: explain why only the contact is singular
tp_base_contact_list_one_contact_groups_changed: explain why only the contact is singular

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib