Fix closing code tags in docs/contributing/common-scenarios.html (#828)
Fix closing code tags in docs/contributing/common-scenarios.html (#828)


JakeChampion/polyfill-service,kdzwinel/polyfill-service,mcshaz/polyfill-service,mcshaz/polyfill-service,jonathan-fielding/polyfill-service,jonathan-fielding/polyfill-service,JakeChampion/polyfill-service,jonathan-fielding/polyfill-service,kdzwinel/polyfill-service,mcshaz/polyfill-service,kdzwinel/polyfill-service