Fix typos in hot_spec documentation
Fix typos in hot_spec documentation

Fix typos and format mistakes in hot_spec docs.
Besides that, all lines now < 80 characters.

Change-Id: I65a69cfa1912a139e162acf8a2bd6d279d1eb46c

gonzolino/heat,miguelgrinberg/heat,cryptickp/heat,srznew/heat,dragorosson/heat,rh-s/heat,steveb/heat,maestro-hybrid-cloud/heat,jasondunsmore/heat,noironetworks/heat,dims/heat,openstack/heat,dragorosson/heat,jasondunsmore/heat,cwolferh/heat-scratch,noironetworks/heat,steveb/heat,openstack/heat,srznew/heat,pratikmallya/heat,dims/heat,takeshineshiro/heat,miguelgrinberg/heat,pratikmallya/heat,maestro-hybrid-cloud/heat,rh-s/heat,cwolferh/heat-scratch,gonzolino/heat,takeshineshiro/heat,cryptickp/heat