Update macros.md to include code fencing
Update macros.md to include code fencing

yhj630520/sagan,dsyer/sagan,lowtalker/sagan,dharmaraju/sagan,andriykonoz/sagan,dsyer/sagan,dvaughn555/sagan,amit-siddhu/sagan,spring-io/sagan,dlizarra/sagan,dsyer/sagan,garylgh/sagan,dvaughn555/sagan,dvaughn555/sagan,TabberGit/sagan,mbateman/sagan,spring-io/sagan,BHASKARSDEN277GITHUB/sagan,seoilhyun/sagan,vizewang/sagan,garylgh/sagan,eonezhang/sagan,lowtalker/sagan,vizewang/sagan,seoilhyun/sagan,eonezhang/sagan,TabberGit/sagan,vizewang/sagan,seoilhyun/sagan,vizewang/sagan,BHASKARSDEN277GITHUB/sagan,TabberGit/sagan,dkushner/sagan,dharmaraju/sagan,rwinch/sagan,dkushner/sagan,martinlippert/sagan,rwinch/sagan,amit-siddhu/sagan,martinlippert/sagan,dharmaraju/sagan,dkushner/sagan,amit-siddhu/sagan,BHASKARSDEN277GITHUB/sagan,andriykonoz/sagan,spring-io/sagan,yhj630520/sagan,martinlippert/sagan,rwinch/sagan,yhj630520/sagan,seoilhyun/sagan,amit-siddhu/sagan,martinlippert/sagan,garylgh/sagan,andriykonoz/sagan,eonezhang/sagan,dlizarra/sagan,gregturn/sagan,mbateman/sagan,mbateman/sagan,yhj630520/sagan,dlizarra/sagan,lowtalker/sagan,gregturn/sagan,eonezhang/sagan,lowtalker/sagan,dsyer/sagan,BHASKARSDEN277GITHUB/sagan,rwinch/sagan,gregturn/sagan,andriykonoz/sagan,garylgh/sagan,dlizarra/sagan,mbateman/sagan,dkushner/sagan,spring-io/sagan,dvaughn555/sagan,dharmaraju/sagan,TabberGit/sagan