restore field negation by !

java/java-tests/testData/codeInsight/completion/normal/FieldNegation.java

@@ -0,0 +1,7 @@
+public class ConstConfig {
+  public static boolean testMode = false;
+    
+    {
+        if (test<caret>x)
+    }
+}

java/java-tests/testData/codeInsight/completion/normal/FieldNegation_after.java

@@ -0,0 +1,7 @@
+public class ConstConfig {
+  public static boolean testMode = false;
+    
+    {
+        if (!testMode<caret>x)
+    }
+}

java/java-tests/testSrc/com/intellij/codeInsight/completion/NormalCompletionTest.groovy

@@ -582,6 +582,8 @@ public class NormalCompletionTest extends LightFixtureCompletionTestCase {
     checkResult()
   }
 
+  public void testFieldNegation() throws Throwable { doTest('!');}
+
   public void testSuperInConstructor() throws Throwable {
     doTest();
   }