diff --git a/string/doc/usage.xml b/string/doc/usage.xml
index 291a525..142bb2e 100644
--- a/string/doc/usage.xml
+++ b/string/doc/usage.xml
@@ -135,12 +135,12 @@
         << endl; // prints "command.com is an executable"
     
     //..
-    char text1[]="hello world!";
+    char text1[]="hello";
     cout 
         << text1 
-        << (all( text1, is_lower() )? "is": "is not")
+        << (all( text1, is_lower() )? " is": " is not")
         << " written in the lower case" 
-        << endl; // prints "hello world! is written in the lower case"
+        << endl; // prints "hello is written in the lower case"
         </programlisting>
         <para>
             The predicates determine whether if a substring is contained in the input string
@@ -149,6 +149,11 @@
             simply contains the substring or if both strings are equal. See the reference for 
             <headername>boost/algorithm/string/predicate.hpp</headername> for more details. 
         </para>
+        <para>  
+            Note that if we had used "hello world" as the input to the test, it would have
+            output "hello world is not written in the lower case" because the space in the
+            input string is not a lower case letter.
+        </para>
         <para>  
             In addition the algorithm <functionname>all()</functionname> checks
             all elements of a container to satisfy a condition specified by a predicate.