can_you_hear_1, can_you_hear_2 and can_you_hear_3
random_draw_info_1, random_draw_info_2 and random_draw_info_3
data_discrepancy_1 and data_discrepancy_2
what_content_1, what_content_2 and what_content_3
where_content_1 and where_content_2
There might be other less obvious ones.
to_default_gradebook and gradebook_note_g
students_will_receive with immediate_feedback_2, feedback_on_submission_1, no_feedback_short_2, feedback_2 and at
will_be and available_on
is and available_immediately_2
to, to_the_entire_class and at (see samigo-app/src/java/org/sakaiproject/tool/assessment/ui/listener/author/PublishAssessmentListener.java)
Looks like there are lots of issues with strings built with adding optional parts with tests. I don't think this will be easy to fix before the string freeze for 2.8.