JIRA should not allow spaces at the end of a custom field option

Situation: an option of a custom field that has an empty space at the end, e.g. "test ", when creating an issue and selecting this option, a stacktrace is presented on the screen, saying the selected option is invalid.

Customers' request is:
1) If spaces at the end of multi select list items is a problem in certain browsers, there should be:

• a warning to users who are creating custom fields
• a way for the user to see if there is an extra space at the end of the list items they've created
• a way for users to edit their list items to remove spaces without having to delete and re-create (and re-order) them.