doc: hint regarding iomanip on string

mrw/string.hpp

@@ -9,6 +9,9 @@
     @license LGPL, see file <a href="license.html">COPYING</a>
 
     $Log$
+    Revision 1.5  2005/01/28 07:53:09  marc
+    doc: hint regarding iomanip on string
+
     Revision 1.4  2004/12/20 13:24:08  marc
     from string conversion throws exception in case of failure
 
@@ -154,6 +157,10 @@ namespace mrw {
          s = 13.5 + s + 24.8;
          @endcode
 
+      @note Please note that you can use the shift operator on
+            strings, but the IO manipulators from @c iomanip don't
+            work, nor @c std::endl and thelike.
+
       @note The signature of some string functions has changed:
             They may now throw exceptions if conversion fails!
             (since 1.4.1)