Encoding error with en-dash and em-dash

[gRegorLove]

Only appears to happen with direct input. Pasting the h-event from https://indiewebcamp.com/Template:one-day-event caused the error below. Entering the URL it parsed normally.

Traceback (most recent call last): File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1535, in __call__ rv = self.handle_exception(request, response, e) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__ rv = self.router.dispatch(request, response) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher return route.handler_adapter(request, response) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__ return handler.dispatch() File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch return self.handle_exception(e, self.app.debug) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch return method(*args, **kwargs) File "/base/data/home/apps/s~unmung2/2.390724726696811485/unmung.py", line 386, in get self.redirect("/?"+urllib.urlencode({'html':html,'pretty':prettyText})) File "/base/data/home/runtimes/python27/python27_dist/lib/python2.7/urllib.py", line 1307, in urlencode v = quote_plus(str(v)) UnicodeEncodeError: 'ascii' codec can't encode character u'\u2013' in position 177: ordinal not in range(128)