title: Difference between dplyr::rename and dplyr::rename_all
body: <p>I have reviewed the documentation for <code>dplyr</code> multiple times and it indicates that <code>dplyr::rename_all</code> is a "scoped" variant of <code>dplyr::rename</code>. Can someone explain what this entails with regard to syntax and functionality? Why use one versus the other? The documentation for <code>dplyr</code> is not clear about this.</p>