@Override annotation is not supported at build time by Java 1.5 for interface methods.

Updating the STATUS file too.

STATUS

@@ -1,10 +1,10 @@
 Apache Ant Status
-Last modified at 2014-05-26
+Last modified at 2016-02-24
 
 Release:
-    Current:        1.9.4  (in GIT Tag: ANT_194)
+    Current:        1.9.6  (in GIT Tag: ANT_196)
     Maintenance:    1.9.x  (in GIT Branch: master)
-    Development:    1.9.5  (in GIT Branch: master)
+    Development:    1.9.7  (in GIT Branch: master)
 
 Assets:
     DNS:                ant.apache.org

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

@@ -962,7 +962,7 @@ public class Replace extends MatchingTask {
     private Iterator<Object> getOrderedIterator(Properties props) {
         List<Object> keys = new ArrayList<Object>(props.keySet());
         Collections.sort(keys, new Comparator<Object>() {
-                @Override
+                //Override annotation is not supported as long as we want to support building Ant on Java 1.5
                 public int compare(Object key1, Object key2) {
                     return compare(key1.toString(), key2.toString());
                 }