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diff --git a/doc/haddock.sgml b/doc/haddock.sgml
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@@ -469,6 +469,22 @@
</varlistentry>
<varlistentry>
+ <term><option>-v</option></term>
+ <term><option>--verbose</option></term>
+ <indexterm><primary><option>-v</option></primary>
+ </indexterm>
+ <indexterm><primary><option>--verbose</option></primary>
+ </indexterm>
+ <listitem>
+ <para>Increase verbosity. Currently this will cause Haddock
+ to emit some extra warnings, in particular about modules
+ which were imported but it had no information about (this is
+ often quite normal; for example when there is no information
+ about the <literal>Prelude</literal>).</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>-V</option></term>
<term><option>--version</option></term>
<indexterm><primary><option>-V</option></primary></indexterm>