looks as if bug 41948 was reappearing on Win7, needs further inverstigation - add some diagnostics

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@936720 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Move.java

@@ -338,6 +338,8 @@ public class Move extends Copy {
             destFile = getFileUtils().normalize(destFile.getAbsolutePath());
             if (destFile.equals(sourceFile)) {
                 //no point in renaming a file to its own canonical version...
+                log("Rename of " + sourceFile + " to " + destFile
+                    + " is a no-op.", Project.MSG_VERBOSE);
                 return true;
             }
             if (!(sourceFile.equals(destFile.getCanonicalFile()) || destFile.delete())) {

src/main/org/apache/tools/ant/util/FileUtils.java

@@ -1223,6 +1223,7 @@ public class FileUtils {
      * @since Ant 1.6
      */
     public void rename(File from, File to) throws IOException {
+        // identical logic lives in Move.renameFile():
         from = normalize(from.getAbsolutePath()).getCanonicalFile();
         to = normalize(to.getAbsolutePath());
         if (!from.exists()) {