Add polyfill for 'includes' to support IE11 (#4944)
Add polyfill for 'includes' to support IE11 (#4944)


javatlacati/codecombat,javatlacati/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,codecombat/codecombat,codecombat/codecombat,jeremiahyan/codecombat,javatlacati/codecombat,codecombat/codecombat,jeremiahyan/codecombat,codecombat/codecombat,jeremiahyan/codecombat,javatlacati/codecombat,codecombat/codecombat