improve import suggestion

pkg/analysis_server/test/completion_test.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 test.completion.support;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:unittest/unittest.dart';
@@ skipping 1964 matching lines @@
         failingTests: '1');
 
     // operators in return
     buildTests('test016',
         '''class X {dynamic f(a,b,c) {return a + b * c !1;}}''', <String>[
       "1+=="
     ], failingTests: '1');
 
     // keywords
     buildTests('test017', '''
-!1library foo;
-!2import 'x' !5as r;
+!1!2import 'x' !5as r;
 !3export '!8uri' !6hide Q !7show X;
 !4part 'x';''', <String>[
       "1+library",
-      "2+import",
+      "2+import '!';",
       "3+export",
       "4+part",
       "5+as",
       "6+hide",
       "7+show",
       "8-null"
-    ], failingTests: '1567');
+    ], failingTests: '567');
 
     // keywords
     buildTests('test018', '''!1part !2of foo;''', <String>["1+part", "2+of"],
         failingTests: '2');
 
     buildTests('test019', '''
 var truefalse = 0;
 var falsetrue = 1;
 main() {
   var foo = true!1
@@ skipping 278 matching lines @@
       } else {
         ++expectedPassCount;
         tester(testName, () {
           CompletionTestCase test = new CompletionTestCase();
           return test.runTest(spec, extraFiles);
         });
       }
     }
   }
 }