testsuite: add and use asser_line_equals with better messages
remove a spurious unicode usage
remove whats already in _urllib from werkzeug.urls
split the url fix test into 2 andu se better assertions
the safe passed to quoter is always a bytestring, correctly iterate it
fix quoter repr test and the quoters repr
Added more informative error message to coerce_args
Added encoding arg to coerce_args
Use coerce_args in urls.url_*