explained: <literal>commands</> describes <application>psql</>'s
backslash commands; <literal>options</> describes the command-line
options that can be passed to <application>psql</>;
- and <literal>variables</> shows help about about <application>psql</application> configuration
+ and <literal>variables</> shows help about <application>psql</application> configuration
variables.
</para>
</listitem>
explained: <literal>commands</> describes <application>psql</>'s
backslash commands; <literal>options</> describes the command-line
options that can be passed to <application>psql</>;
- and <literal>variables</> shows help about about <application>psql</application> configuration
+ and <literal>variables</> shows help about <application>psql</application> configuration
variables.
</para>
</listitem>