Fix minor issues (doc, #'s, and more template errors)

- a very productive day

go/go/forms.py

@@ -16,6 +16,7 @@ class URLForm(forms.ModelForm):
         })
     )
 
+    # Check to make sure the short url has not been used
     def unique_short(value):
         try:
             URL.objects.get(short__iexact=value)

go/go/models.py

@@ -43,7 +43,7 @@ class URL(models.Model):
         tries = 1
         while tries < 100:
             try:
-                # urls = URL.objects.get(short__iexact=short)
+                urls = URL.objects.get(short__iexact=short)
                 tries += 1
                 hashids_counter += 1
             except URL.DoesNotExist:

go/go/views.py

@@ -117,7 +117,7 @@ def index(request):
                 random_short = URL.generate_valid_short()
                 if random_short is None:
                     return HttpResponseServerError(
-                        render(request, 'core/500.html', {})
+                        render(request, '500.html', {})
                     )
                 else:
                     url.short = random_short