- opened_by_html: Created by %{user} <abbr title='%{exact_time}'>%{when}</abbr>
- opened_by_anonymous_html: Created by anonymous <abbr title='%{exact_time}'>%{when}</abbr>
- commented_by_html: Comment from %{user} <abbr title='%{exact_time}'>%{when}</abbr>
- commented_by_anonymous_html: Comment from anonymous <abbr title='%{exact_time}'>%{when}</abbr>
- closed_by_html: Resolved by %{user} <abbr title='%{exact_time}'>%{when}</abbr>
- closed_by_anonymous_html: Resolved by anonymous <abbr title='%{exact_time}'>%{when}</abbr>
- reopened_by_html: Reactivated by %{user} <abbr title='%{exact_time}'>%{when}</abbr>
- reopened_by_anonymous_html: Reactivated by anonymous <abbr title='%{exact_time}'>%{when}</abbr>
- hidden_by_html: Hidden by %{user} <abbr title='%{exact_time}'>%{when}</abbr>