Merge pull request #1983 from willingc/test-tilde

add test case for user with tilde

jupyterhub/tests/test_proxy.py

@@ -154,6 +154,8 @@ def test_external_proxy(request):
     'zoe',
     '50fia',
     '秀樹',
+    '~TestJH',
+    'has@',
 ])
 def test_check_routes(app,  username, disable_check_routes):
     proxy = app.proxy