Fix #puts without arguments
Fix #puts without arguments

This bug went unnoticed in browsers because `console.log` can’t output
anything without and ending newline.

Mogztter/opal,Flikofbluelight747/opal,wied03/opal,castwide/opal,Ajedi32/opal,jgaskins/opal,suyesh/opal,wied03/opal,jannishuebl/opal,fazibear/opal,catprintlabs/opal,catprintlabs/opal,jgaskins/opal,Flikofbluelight747/opal,Mogztter/opal,iliabylich/opal,kachick/opal,catprintlabs/opal,suyesh/opal,suyesh/opal,Flikofbluelight747/opal,gabrielrios/opal,Mogztter/opal,kachick/opal,fazibear/opal,merongivian/opal,jannishuebl/opal,jannishuebl/opal,bbatsov/opal,opal/opal,wied03/opal,gausie/opal,c42engineering/opal,merongivian/opal,iliabylich/opal,fazibear/opal,Ajedi32/opal,opal/opal,gabrielrios/opal,bbatsov/opal,bbatsov/opal,c42engineering/opal,c42engineering/opal,Ajedi32/opal,gausie/opal,merongivian/opal,gabrielrios/opal,kachick/opal,castwide/opal,gausie/opal,kachick/opal,opal/opal,opal/opal,castwide/opal,jgaskins/opal,iliabylich/opal,Mogztter/opal