Tweaks for hover.

pkg/analysis_server/lib/src/computer/computer_hover.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library computer.hover;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart'
     show HoverInformation;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 84 matching lines @@
         }
         // description
         hover.elementDescription = element.toString();
         hover.elementKind = element.kind.displayName;
         // not local element
         if (element.enclosingElement is! ExecutableElement) {
           // containing class
           ClassElement containingClass =
               element.getAncestor((e) => e is ClassElement);
           if (containingClass != null) {
-            hover.containingClassDescription = containingClass.toString();
+            hover.containingClassDescription = containingClass.displayName;
           }
           // containing library
           LibraryElement library = element.library;
           if (library != null) {
             hover.containingLibraryName = library.name;
             hover.containingLibraryPath = library.source.fullName;
           }
         }
         // documentation
         hover.dartdoc = _computeDocumentation(element);
       }
       // parameter
       hover.parameter = _safeToString(expression.bestParameterElement);
       // types
-      hover.staticType = _safeToString(expression.staticType);
+      if (element == null || element is VariableElement) {
+        hover.staticType = _safeToString(expression.staticType);
+      }
       hover.propagatedType = _safeToString(expression.propagatedType);
       // done
       return hover;
     }
     // not an expression
     return null;
   }
 
   String _computeDocumentation(Element element) {
     if (element is ParameterElement) {
       element = element.enclosingElement;
     }
     String dartDoc = element.computeDocumentationComment();
     return _removeDartDocDelimiters(dartDoc);
   }
 
   static _safeToString(obj) => obj != null ? obj.toString() : null;
 }