@kohsuke suggests using '@' as separator between shortName & version, rather...

@kohsuke suggests using '@' as separator between shortName & version, rather than ' ', in case we want to allow multiple owners in the future.

core/src/main/java/hudson/util/XStream2.java

@@ -127,7 +127,7 @@ public class XStream2 extends XStream {
                     return null;
                 }
                 PluginWrapper p = pm.whichPlugin(clazz);
-                return p != null ? p.getShortName() + ' ' + p.getVersion() : null;
+                return p != null ? p.getShortName() + '@' + p.getVersion() : null;
             }
         });
         return reflectionConverter;

test/src/test/java/hudson/PluginManagerTest.java

@@ -222,9 +222,9 @@ public class PluginManagerTest extends HudsonTestCase {
             UpdateSite.signatureCheck = true;
         }
         assertNotNull(site.getData());
-        assertEquals(Collections.emptyList(), jenkins.getPluginManager().prevalidateConfig(new StringInputStream("<whatever><runant plugin=\"ant 1.1\"/></whatever>")));
+        assertEquals(Collections.emptyList(), jenkins.getPluginManager().prevalidateConfig(new StringInputStream("<whatever><runant plugin=\"ant@1.1\"/></whatever>")));
         assertNull(jenkins.getPluginManager().getPlugin("tasks"));
-        List<Future<UpdateCenterJob>> jobs = jenkins.getPluginManager().prevalidateConfig(new StringInputStream("<whatever><tasks plugin=\"tasks 2.23\"/></whatever>"));
+        List<Future<UpdateCenterJob>> jobs = jenkins.getPluginManager().prevalidateConfig(new StringInputStream("<whatever><tasks plugin=\"tasks@2.23\"/></whatever>"));
         assertEquals(1, jobs.size());
         UpdateCenterJob job = jobs.get(0).get(); // blocks for completion
         assertEquals("InstallationJob", job.getType());