Add clarifying sentence to NewInjector docs.
Add clarifying sentence to NewInjector docs.

martinbaillie/kit,anarcher/kit,xmattstrongx/kit,xmattstrongx/kit,martinbaillie/kit,basvanbeek/kit,go-kit/kit,nicot/kit,anarcher/kit,basvanbeek/kit,go-kit/kit,nicot/kit