[CMake] cmake --help-property EchoString

[Mathieu Malaterre]

EchoString is written with lower case characters and is not properly
parsed for documentation:

$ ./bin/cmake --help-property EchoString
cmake version 2.5-20070809
Argument "ECHOSTRING" to --help-property is not a CMake property.  Use
--help-property-list to see all properties.

Doc also contains a typo:

Index: Source/cmTarget.cxx
===================================================================
RCS file: /cvsroot/CMake/CMake/Source/cmTarget.cxx,v
retrieving revision 1.161
diff -u -r1.161 cmTarget.cxx
--- Source/cmTarget.cxx 3 Aug 2007 20:31:08 -0000       1.161
+++ Source/cmTarget.cxx 9 Aug 2007 12:30:25 -0000
@@ -91,7 +91,7 @@
   cm->DefineProperty
     ("EchoString", cmProperty::TARGET,
      "A message to be displayed when the target is built.",
-     "A message to display on some generaters (such as makefiles) when "
+     "A message to display on some generators (such as makefiles) when "
      "the target is built.");

   cm->DefineProperty

-- 
Mathieu