title: 'find-tag' Cannot Locate Emacs Source
body: <p>I've been working through <a href="https://www.gnu.org/software/emacs/manual/html_mono/eintr.html" rel="nofollow">An Introduction to Programming in Emacs Lisp</a> and have run into an issue on an exercise in section 4.6. The exercise states <code>Using find-tag, find the source for the copy-to-buffer function.</code> However, when using find-tag on my Mac installation of Emacs 24.2, it is unable to find the tag for the <code>copy-to-buffer</code> function. I have already created a tags file in the Emacs <code>/usr/local/share/emacs/24.2/lisp</code> directory, and <code>find-tag</code> is able to find many functions within this directory, but not <code>copy-to-buffer</code>. Any thoughts?</p>