solve problem refering jars specfied by Class-Path attribute in manifest of a ant task jar file, when this ant task jar file is located in a directory with space. Bugzilla Report 37085.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@327061 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/AntClassLoader.java

@@ -27,6 +27,7 @@ import java.io.Reader;
 import java.lang.reflect.Constructor;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.net.URLDecoder;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashMap;
@@ -499,7 +500,7 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
                         + " loader", Project.MSG_VERBOSE);
                     continue;
                 }
-                File libraryFile = new File(libraryURL.getFile());
+                File libraryFile = new File(URLDecoder.decode(libraryURL.getFile()));
                 if (libraryFile.exists() && !isInPath(libraryFile)) {
                     addPathFile(libraryFile);
                 }