Fix JavaScript errors in blocks help
Fix JavaScript errors in blocks help

fixes #344

venkat24/codeworld,pranjaltale16/codeworld,venkat24/codeworld,parvmor/codeworld,stefan-j/codeworld,three/codeworld,alphalambda/codeworld,venkat24/codeworld,alphalambda/codeworld,parvmor/codeworld,alphalambda/codeworld,google/codeworld,tgdavies/codeworld,nomeata/codeworld,tgdavies/codeworld,nomeata/codeworld,three/codeworld,pranjaltale16/codeworld,stefan-j/codeworld,parvmor/codeworld,three/codeworld,stefan-j/codeworld,tgdavies/codeworld,pranjaltale16/codeworld,nomeata/codeworld,google/codeworld,google/codeworld