Fix --enable--hcache typo in the manual.

diff --git a/doc/manual.xml.head b/doc/manual.xml.head
index 3e9478f246bfe2e5751c850e04afab15741aa772..3640d600f5dbc1eb023295f9e27d54f1a321b696 100644 (file)
--- a/doc/manual.xml.head
+++ b/doc/manual.xml.head
@@ -4673,7 +4673,7 @@ thousands of single files (since Maildir and MH use one file per message.)
 
 <para>
 Header caching can be enabled via the configure script and the
-<emphasis>--enable--hcache</emphasis> option. It's not turned on
+<emphasis>--enable-hcache</emphasis> option. It's not turned on
 by default because external database libraries are required: one
 of qdbm, gdbm or bdb must be present.
 </para>