minor simplicifcation for #2579
minor simplicifcation for #2579

rbtcollins/reveal.js,maximesinclair/presentations,rbtcollins/reveal.js,lvh/reveal.js,maximesinclair/presentations,10xEngineer/reveal.js,kenkunz/js-crash-course,dbs/reveal.js,rbtcollins/reveal.js,kenkunz/js-crash-course,seefood/DIYHolidays,hakimel/reveal.js,rbtcollins/reveal.js,siddhartha-gadgil/presentations,dbs/reveal.js,tehfedaykin/10CommandmentsofCommunityOrganizing,lvh/reveal.js,siddhartha-gadgil/presentations,rbtcollins/reveal.js,Jean85/reveal.js,siddhartha-gadgil/presentations,10xEngineer/reveal.js,jayramj/agile-retro,rbtcollins/reveal.js,tehfedaykin/10CommandmentsofCommunityOrganizing,seefood/DIYHolidays,hakimel/reveal.js,jayramj/agile-retro,Jean85/reveal.js