Fix a bug that caused markdown rendering to fail if gfm code language was set to something not supported
Fix a bug that caused markdown rendering to fail if gfm code language was set to something not supported
pridemusvaire/wintersmith,MorJar/wintersmith,jmptrader/wintersmith,1upon0/wintersmith,mimiflynn/wintersmith,cwhatley/wintersmith,jmptrader/wintersmith,taras/embersmith,pridemusvaire/wintersmith,jnordberg/wintersmith,MorJar/wintersmith,mimiflynn/wintersmith