Fix typo in test case for function node
Fix typo in test case for function node

namgk/node-red,node-red/node-red,namgk/node-red,btsimonh/node-red,node-red/node-red,node-red/node-red,mw75/node-red,HiroyasuNishiyama/node-red,HiroyasuNishiyama/node-red,mw75/node-red,mw75/node-red,HiroyasuNishiyama/node-red,btsimonh/node-red,mw75/node-red,btsimonh/node-red