title: What is "with-eval-after-load" in Emacs Lisp
body: <p>I came across the macro <code>with-eval-after-load</code> when trying to install <code>persp-mode</code> from <a href="https://github.com/Bad-ptr/persp-mode.el">here</a>. But I am unable to find the macro inside Emacs and/or on Google. Where is it defined? Is it part of standard Emacs Lisp?</p>