Index: ch09.xml
===================================================================
--- ch09.xml	(revision 1329)
+++ ch09.xml	(working copy)
@@ -5449,7 +5449,7 @@
 
       <refsect1 id="svn-ch-9-sect-5.1.1">
         <title>Synopsis</title>
-        <programlisting>svnversion [OPTIONS] WC_PATH [TRAIL_URL]</programlisting>
+        <programlisting>svnversion [OPTIONS] [WC_PATH [TRAIL_URL]]</programlisting>
       </refsect1>
 
       <refsect1 id="svn-ch-9-sect-5.1.2">
@@ -5465,6 +5465,10 @@
           (detection of switches within WC_PATH does not rely on
           TRAIL_URL).</para>
 
+        <para>When WC_PATH is not defined the current directory
+          will be used as the working copy path.  TRAIL_URL cannot be
+          defined if WC_PATH is not explicitly given.</para>
+  
       </refsect1>
 
       <refsect1 id="svn-ch-9-sect-5.1.3">
@@ -5516,11 +5520,12 @@
           example, immediately after an update), then that revision is
           printed out:</para>
 
-        <screen>$ svnversion .
+        <screen>$ svnversion
 4168</screen>
 
         <para>You can add TRAIL_URL to show that the working copy is
-          not switched from what you expect:</para>
+          not switched from what you expect.  Note that the WC_PATH was
+          required in this command:</para>
 
         <screen>$ svnversion . /repos/svn/trunk
 4168</screen>
@@ -5528,32 +5533,32 @@
         <para>For a mixed-revision working copy, the range of
           revisions present is printed:</para>
 
-        <screen>$ svnversion .
+        <screen>$ svnversion
 4123:4168</screen>
 
         <para>If the working copy contains modifications, a trailing
           "M" is added:</para>
 
-        <screen>$ svnversion .
+        <screen>$ svnversion
 4168M</screen>
 
         <para>If the working copy is switched, a trailing "S" is
           added:</para> 
 
-        <screen>$ svnversion .
+        <screen>$ svnversion
 4168S</screen>
 
         <para>Thus, here is a mixed-revision, switched working copy
           containing some local modifications:</para>
 
-        <screen>$ svnversion .
+        <screen>$ svnversion
 4212:4168MS</screen>
 
         <para>If invoked on a directory that is not a working copy,
           <command>svnversion</command> assumes it is an exported
           working copy and prints "exported":</para>
 
-        <screen>$ svnversion .
+        <screen>$ svnversion
 exported</screen>
 
       </refsect1>