give hint what warnings were expected and which file (#3842)
give hint what warnings were expected and which file (#3842)

currently if you "break" warnings you have no idea which ones where supposed to show
or which module actually failed.
rlugojr/webpack,SimenB/webpack,EliteScientist/webpack,jescalan/webpack,pugnascotia/webpack,nkzawa/webpack,ts-webpack/webpack,pugnascotia/webpack,webpack/webpack,SimenB/webpack,webpack/webpack,webpack/webpack,ts-webpack/webpack,NekR/webpack,EliteScientist/webpack,cesarandreu/webpack,cesarandreu/webpack,g0ddish/webpack,nkzawa/webpack,ts-webpack/webpack,ts-webpack/webpack,webpack/webpack,SimenB/webpack,pugnascotia/webpack,nkzawa/webpack,rlugojr/webpack,cesarandreu/webpack,rlugojr/webpack,NekR/webpack,jescalan/webpack,SimenB/webpack,g0ddish/webpack,g0ddish/webpack,jescalan/webpack