Fix some more error messages that refer to multiple arguments.
Fix some more error messages that refer to multiple arguments.

parvmor/codeworld,pranjaltale16/codeworld,nomeata/codeworld,pranjaltale16/codeworld,tgdavies/codeworld,google/codeworld,alphalambda/codeworld,Ye-Yong-Chi/codeworld,stefan-j/codeworld,stefan-j/codeworld,pranjaltale16/codeworld,three/codeworld,xwysp/codeworld,d191562687/codeworld,stefan-j/codeworld,venkat24/codeworld,parvmor/codeworld,google/codeworld,alphalambda/codeworld,d191562687/codeworld,google/codeworld,tgdavies/codeworld,tgdavies/codeworld,parvmor/codeworld,nomeata/codeworld,three/codeworld,three/codeworld,d191562687/codeworld,venkat24/codeworld,nomeata/codeworld,Ye-Yong-Chi/codeworld,alphalambda/codeworld,xwysp/codeworld,xwysp/codeworld,Ye-Yong-Chi/codeworld,venkat24/codeworld