To recreate: - create a new report from SQL - Type 'test' (including the single quotation marks) - observe that the auto-complete popup appears when you type the closing quotation mark - type "test" and see it does the same with double quotation marks This is really unhelpful. If I'm quote-wrapping something, it's because it's a string rather than a field.
Update to add that is also pops up the autocomplete when closing a parentheses, and that's possibly even less helpful.