refactor(ES6): changed lengthy error message string to template literal
refactor(ES6): changed lengthy error message string to template literal

g0ddish/webpack,SimenB/webpack,NekR/webpack,webpack/webpack,SimenB/webpack,g0ddish/webpack,webpack/webpack,SimenB/webpack,ts-webpack/webpack,rlugojr/webpack,jescalan/webpack,rlugojr/webpack,ts-webpack/webpack,EliteScientist/webpack,ts-webpack/webpack,SimenB/webpack,webpack/webpack,webpack/webpack,g0ddish/webpack,EliteScientist/webpack,jescalan/webpack,jescalan/webpack,NekR/webpack,ts-webpack/webpack,rlugojr/webpack