Fill in the blanks with times

Within the "fill-in-the-blanks" content type, the colon : causes a remark to be shown as a hint to the user. This conflicts with times in the format xx:xx hrs. if they are part of the required answer. As a consequence, the time format cannot be used when defining answers in this content type. The same will happen if the colon is used to introduce direct speech.

It would be disirable to define a different character not normally used within text as the trigger for hints, e.g. # or @.