fix 和原始sgml tag不匹配

Author: ChenHuajun

postgresql/doc/src/sgml/docguide.sgml

@@ -426,27 +426,13 @@ checking for xsltproc... xsltproc
 checking for fop... fop
 checking for dbtoepub... dbtoepub
 </screen>
-  If <filename>xmllint</filename> or <filename>xsltproc</filename> is not
+   If <filename>xmllint</filename> or <filename>xsltproc</filename> is not
    found, you will not be able to build any of the documentation.
    <filename>fop</filename> is only needed to build the documentation in
    PDF format.
    <filename>dbtoepub</filename> is only needed to build the documentation
    in EPUB format.
   </para>
-
-  <para>
-   If necessary, you can tell <filename>configure</filename> where to find
-   these programs, for example
-<screen>
-./configure ... XMLLINT=/opt/local/bin/xmllint ...
-</screen>
-   Also, if you want to ensure that <filename>xmllint</filename>
-   and <filename>xsltproc</filename> will not perform any network access,
-   you can do something like
-<screen>
-./configure ... XMLLINT="xmllint -&minus;nonet" XSLTPROC="xsltproc -&minus;nonet" ...
-</screen>
-  </para>
 ____________________________________________________________________________-->
   <para>
    在你能编译文档之前，你需要运行<filename>configure</filename>脚本，就像你在编译<productname>PostgreSQL</productname>程序本身时所作的那样。
@@ -462,17 +448,6 @@ checking for dbtoepub... dbtoepub
    <filename>dbtoepub</filename>仅在构建EPUB格式的文档时需要。
   </para>
 
-  <para>
-   如果需要，你可以告诉<filename>configure</filename>到哪里去找这些程序，例如
-<screen>
-./configure ... XMLLINT=/opt/local/bin/xmllint ...
-</screen>
-   另外，如果你想确保<filename>xmllint</filename>和<filename>xsltproc</filename>不会执行任何网络访问，你可以如下操作
-<screen>
-./configure ... XMLLINT="xmllint --nonet" XSLTPROC="xsltproc --nonet" ...
-</screen>
-  </para>
-
 <!--==========================orignal english content==========================
   <para>
    If necessary, you can tell <filename>configure</filename> where to find
@@ -489,11 +464,11 @@ checking for dbtoepub... dbtoepub
   </para>
 ____________________________________________________________________________-->
   <para>
-   如果需要，你可以告知 <filename>configure</filename> 在哪里发现这些程序，例如
+   如果需要，你可以告诉<filename>configure</filename>到哪里去找这些程序，例如
 <screen>
 ./configure ... XMLLINT=/opt/local/bin/xmllint ...
 </screen>
-   此外，如果你想要确保 <filename>xmllint</filename> 和 <filename>xsltproc</filename> 将不会执行任何网络访问,你可以像这样做
+   另外，如果你想确保<filename>xmllint</filename>和<filename>xsltproc</filename>不会执行任何网络访问，你可以如下操作
 <screen>
 ./configure ... XMLLINT="xmllint --nonet" XSLTPROC="xsltproc --nonet" ...
 </screen>