Merge pull request #130 from twogee/correct-javadoc

Correct javadoc
diff --git a/src/main/org/apache/tools/ant/types/resources/FileResource.java b/src/main/org/apache/tools/ant/types/resources/FileResource.java
index d8d604c..17ed7cc 100644
--- a/src/main/org/apache/tools/ant/types/resources/FileResource.java
+++ b/src/main/org/apache/tools/ant/types/resources/FileResource.java
@@ -255,7 +255,8 @@
     private OutputStream getOutputStream(boolean append) throws IOException {
         File f = getNotNullFile();
         if (f.exists()) {
-            if (f.isFile() && !append) {
+            if (Files.isSymbolicLink(f.toPath()) && f.isFile() && !append) {
+                // https://bz.apache.org/bugzilla/show_bug.cgi?id=624
                 f.delete();
             }
         } else {