gdbm: make spacing consistent

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11516 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/gdbm.xml

@@ -50,7 +50,7 @@
 
     <para>准备安装 GDBM：</para>
 
-<screen><userinput remap="configure">./configure --prefix=/usr \
+<screen><userinput remap="configure">./configure --prefix=/usr    \
             --disable-static \
             --enable-libgdbm-compat</userinput></screen>