Not sure why those were added (probably out of unawareness of the option to put an id on a list), but it doesn't make sense; fixed thusly.
Gerald Index: gcc-5/changes.html =================================================================== RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-5/changes.html,v retrieving revision 1.153 diff -u -r1.153 changes.html --- gcc-5/changes.html 1 Sep 2018 23:42:06 -0000 1.153 +++ gcc-5/changes.html 9 Sep 2018 21:24:03 -0000 @@ -972,14 +972,12 @@ <!-- h2>Documentation improvements</h2--> <h2>Other significant improvements</h2> - <h3 id="gcc-ar"></h3> - <ul> + <ul id="gcc-ar"> <li>The <code>gcc-ar</code>, <code>gcc-nm</code>, <code>gcc-ranlib</code> wrappers now understand a <code>-B</code> option to set the compiler to use.</li> </ul> - <h3 id="driver"></h3> - <ul> + <ul id="driver"> <li>When the new command-line option <code>-freport-bug</code> is used, GCC automatically generates a developer-friendly reproducer whenever an internal compiler error is encountered.</li>