Update span.md (#1815)
Update span.md (#1815)


ericstj/corefxlab,KrzysztofCwalina/corefxlab,ericstj/corefxlab,VSadov/corefxlab,whoisj/corefxlab,tarekgh/corefxlab,VSadov/corefxlab,stephentoub/corefxlab,adamsitnik/corefxlab,ericstj/corefxlab,stephentoub/corefxlab,VSadov/corefxlab,dotnet/corefxlab,KrzysztofCwalina/corefxlab,stephentoub/corefxlab,ahsonkhan/corefxlab,ahsonkhan/corefxlab,ericstj/corefxlab,VSadov/corefxlab,stephentoub/corefxlab,stephentoub/corefxlab,stephentoub/corefxlab,adamsitnik/corefxlab,benaadams/corefxlab,joshfree/corefxlab,VSadov/corefxlab,ericstj/corefxlab,ericstj/corefxlab,dotnet/corefxlab,joshfree/corefxlab,benaadams/corefxlab,VSadov/corefxlab,whoisj/corefxlab,tarekgh/corefxlab