WIP: try decoding values when replacing

lib/spandex_phoenix/tracer.ex

@@ -243,6 +243,11 @@ defmodule SpandexPhoenix.Tracer do
 
   # Phoenix doesn't set the plug_route for us, so we have to figure it out ourselves
   defp route_name(%Plug.Conn{path_params: path_params, request_path: request_path}) do
-    Enum.reduce(path_params, request_path, fn {key, value}, acc -> String.replace(acc, value, ":#{key}") end)
+    Enum.reduce(path_params, request_path, &replace_decoded/2)
+  end
+
+  defp replace_decoded({key, value}, acc) do
+    decoded = URI.decode_www_form(value)
+    String.replace(acc, decoded, ":#{key}")
   end
 end