Fix duplicated fodder (#411).
Fix duplicated fodder (#411).

CommaFodder was not cleared between arguments,
so when there was no commaFodder and the argument
was named a previous one was duplicated.

Fixes #411.

google/go-jsonnet,sbarzowski/go-jsonnet,google/go-jsonnet,google/go-jsonnet,sbarzowski/go-jsonnet,sbarzowski/go-jsonnet,google/go-jsonnet,sbarzowski/go-jsonnet,google/go-jsonnet,sbarzowski/go-jsonnet