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add markup for code text.

thehunmonkgroup/freeswitch-kickstart,thehunmonkgroup/freeswitch-vagrant-dev,thehunmonkgroup/freeswitch-kickstart,thehunmonkgroup/freeswitch-vagrant-dev,thehunmonkgroup/freeswitch-kickstart,thehunmonkgroup/freeswitch-vagrant-dev