improve warning until this goes away

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@159308 13f79535-47bb-0310-9956-ffa450edef68

changelog/src/main/org/apache/maven/cvslib/CvsChangeLogGenerator.java

@@ -211,8 +211,7 @@ class CvsChangeLogGenerator extends AbstractChangeLogGenerator
             if (LOG.isWarnEnabled())
             {
                 LOG.warn(
-                    "Unable to find cvs executable. "
-                        + "Changelog will be empty");
+                    "Unable to find cvs executable. Please check that it is in your path, and avoid using spaces in the path name. Changelog will be empty" );
             }
         }
         else