Section filters fail if section name contains a colon #2885
Description
If the section name for a user contains a colon character, then filtering by such a section returns no users.
To reproduce:
- Create a user, and enter text including a colon in the section field (e.g. "a:1").
- Go to the Assigner Tool or Instructor Tools page, select the section containing the colon in the filter, then Refresh List. No students appear.