fix: extra ")}" in 500 error page
fix: extra ")}" in 500 error page

The 500 page included ugly ")}" characters.

eduNEXT/edx-platform,arbrandes/edx-platform,angelapper/edx-platform,arbrandes/edx-platform,arbrandes/edx-platform,eduNEXT/edx-platform,angelapper/edx-platform,angelapper/edx-platform,edx/edx-platform,eduNEXT/edx-platform,eduNEXT/edx-platform,edx/edx-platform,edx/edx-platform,edx/edx-platform,angelapper/edx-platform,arbrandes/edx-platform