The EN DASH is not really required in year ranges such as 2012–2015 when
we're talking about comments in source code that is probably being
displayed in a fixed font anyway. Changing back to an ordinary hypen
allows us to make a meaningful test for use utf8.
This should now correctly list pages banned due to BannedContent.
Previously, there was a stray variable $str instead of the actual page
content being matched.
