Fix minor type in Zip task

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268133 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -136,7 +136,7 @@ public class Zip extends MatchingTask {
             throw new BuildException("basedir attribute must be set, or at least one fileset must be given!");
 
         if (zipFile == null) {
-            throw new BuildException("You must specify the " + archiveType + "file to create!");
+            throw new BuildException("You must specify the " + archiveType + " file to create!");
         }
 
         Vector dss = new Vector ();