t not <code class="docutils literal notranslate"><span class="pre">ababd</span></code>, and the regular
expression <code class="docutils literal notranslate"><span class="pre">^(ab|cd)$</span></code> matches <code class="docutils literal notranslate"><span class="pre">ab</span></code> but not <code class="docutils literal notranslate"><span class="pre">abd</span></code>.</p>
<p>CMake language <a class="reference internal" href="../manual/cmake-language.7.html#escape-sequences"><span class="std std-ref">Esca