Remove 'awful hack' introduced when fixing issue 3029
Remove unused parameters from visitor.h
Merge pull request #3143 from ibuclaw/Wunusedparameters

Remove unused parameters from visitor.h
Merge pull request #3134 from yebblies/issue3029

Remove 'awful hack' introduced when fixing issue 3029
Print postfix, not extra double quote
Merge pull request #3145 from yebblies/postfix

[trival] Print postfix, not extra double quote