<li><code>index-summary by-package</code>
<li><code>index-summary by-number</code>
<li><code>index-maint</code>
- <li><code>index maint</code> <var>maintainer-substring</var>
+ <li><code>index maint</code> <var>maintainer</var>
<li><code>index-packages</code>
- <li><code>index packages</code> <var>package-substring</var>
+ <li><code>index packages</code> <var>package</var>
<li><code>send-unmatched</code> [<code>this</code>|<code>0</code>]
<li><code>send-unmatched</code> <code>last</code>|<code>-1</code>
<li><code>send-unmatched</code> <code>old</code>|<code>-2</code>