Fix bug in error handlers.

Correct spelling error

tests/app/main/test_errorhandlers.py

@@ -0,0 +1,21 @@
+from bs4 import BeautifulSoup
+from flask import url_for
+
+
+def test_bad_url_returns_page_not_found(app_):
+    with app_.test_client() as client:
+        response = client.get('/bad_url')
+        assert response.status_code == 404
+        page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+        assert page.h1.string.strip() == 'Page could not be found'
+
+
+def test_bad_input_returns_something(app_, api_user_active, mock_login):
+    with app_.test_request_context():
+        with app_.test_client() as client:
+            client.login(api_user_active)
+            response = client.get(url_for('main.service_dashboard', service_id=1))
+            response.status == 404
+            print(response.get_data(as_text=True))
+            page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+            assert page.h1.string.strip() == 'Page could not be found'