fix little typo in arrow function argument's remove duplicate code section
fix little typo in arrow function argument's remove duplicate code section

andersontr15/clean-code-javascript-es,greg-dev/clean-code-javascript-pl,DavidVujic/clean-code-javascript,ryanmcdermott/clean-code-javascript,chux0519/clean-code-javascript,HemantPawar/clean-code-javascript