don't highlight the entire expression and add test

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/InspectionGadgetsBundle.properties

@@ -1037,7 +1037,7 @@ non.synchronized.method.overrides.synchronized.method.problem.descriptor=Unsynch
 public.field.accessed.in.synchronized.context.problem.descriptor=Non-private field <code>#ref</code> accessed in synchronized context  #loc
 field.accessed.synchronized.and.unsynchronized.problem.descriptor=Field <code>#ref</code> is accessed in both synchronized and unsynchronized contexts #loc
 extended.for.statement.problem.descriptor=Extended <code>#ref</code> statement #loc
-object.allocation.in.loop.problem.descriptor=Object allocation <code>#ref</code> in loop #loc
+object.allocation.in.loop.problem.descriptor=Object allocation <code>new #ref()</code> in loop #loc
 instantiating.object.to.get.class.object.problem.descriptor=Instantiating object to get Class object #loc
 field.may.be.static.problem.descriptor=Field <code>#ref</code> may be 'static' #loc
 method.may.be.static.problem.descriptor=Method <code>#ref()</code> may be 'static' #loc

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/performance/ObjectAllocationInLoopInspection.java

@@ -71,7 +71,7 @@ public class ObjectAllocationInLoopInspection extends BaseInspection {
       if (isAllocatedOnlyOnce(expression)) {
         return;
       }
-      registerError(expression);
+      registerNewExpressionError(expression);
     }
 
     private static boolean isAllocatedOnlyOnce(

plugins/InspectionGadgets/test/com/siyeh/igtest/performance/object_allocation_in_loop/ObjectAllocationInLoop.java

@@ -0,0 +1,10 @@
+package com.siyeh.igtest.performance.object_allocation_in_loop;
+
+class ObjectAllocationInLoop {
+
+  void m() {
+    while (true) {
+      new <warning descr="Object allocation 'new Object()' in loop">Object</warning>();
+    }
+  }
+}

plugins/InspectionGadgets/testsrc/com/siyeh/ig/performance/ObjectAllocationInLoopInspectionTest.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.siyeh.ig.performance;
+
+import com.intellij.codeInspection.InspectionProfileEntry;
+import com.siyeh.ig.LightInspectionTestCase;
+
+/**
+ * @author Bas Leijdekkers
+ */
+public class ObjectAllocationInLoopInspectionTest extends LightInspectionTestCase {
+  @Override
+  protected InspectionProfileEntry getInspection() {
+    return new ObjectAllocationInLoopInspection();
+  }
+
+  public void testObjectAllocationInLoop() { doTest(); }
+}