Don't report Phoenix.NotAcceptableError to Bugsnag

lib/asciinema/plugsnag_filter.ex

@@ -0,0 +1,9 @@
+defmodule Asciinema.PlugsnagFilter do
+  defmacro __using__(_options \\ []) do
+    quote location: :keep do
+      def handle_errors(_conn, %{reason: %Phoenix.NotAcceptableError{}}) do
+        nil
+      end
+    end
+  end
+end

web/web.ex

@@ -60,6 +60,7 @@ defmodule Asciinema.Web do
   def router do
     quote do
       use Phoenix.Router
+      use Asciinema.PlugsnagFilter
       use Plugsnag
     end
   end