!10 fix rst2odt_prepstyles error

From: @wangxiao65
Reviewed-by: @small_leek
Signed-off-by: @small_leek

python-docutils.spec

@@ -4,7 +4,7 @@
 
 Name:           python-%{modname}
 Version:        0.16
-Release:        3
+Release:        4
 Summary:        Documentation Utilities Written in Python, for General- and Special-Purpose Use
 License:        Public Domain and BSD and Python and GPLv3+
 URL:            http://docutils.sourceforge.net
@@ -36,6 +36,7 @@ Obsoletes: docutils < %{version}-%{release}
 
 %package -n python3-%{modname}
 Summary:        %{summary} for python3
+Requires:       python3-lxml
 %{?python_provide:%python_provide python3-%{modname}}
 
 %description -n python3-%{modname}
@@ -116,6 +117,9 @@ popd
 %doc THANKS.txt docs tools/editors
 
 %changelog
+* Thu Sep 10 2020 wangxiao <wangxiao65@huawei.com> - 0.16-4
+- fix rst2odt_prepstyles error
+
 * Mon Aug 3 2020 wutao <wutao61@huawei.com> - 0.16-3
 - fix test error problem