suggest import uris when import is only text in file

pkg/analysis_server/lib/src/services/completion/keyword_contributor.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 services.completion.contributor.dart.keyword;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
@@ skipping 185 matching lines @@
     }
   }
 
   @override
   visitImportDirective(ImportDirective node) {
     if (entity == node.asKeyword) {
       if (node.deferredKeyword == null) {
         _addSuggestion(Keyword.DEFERRED, DART_RELEVANCE_HIGH);
       }
     }
-    if (entity == node.semicolon || node.combinators.contains(entity)) {
+    // Handle degenerate case where import statement does not have a semicolon
+    // and the cursor is in the uri string
+    if ((entity == node.semicolon &&
+            node.uri != null &&
+            node.uri.offset + 1 != request.offset) ||
+        node.combinators.contains(entity)) {
       _addImportDirectiveKeywords(node);
     }
   }
 
   @override
   visitInstanceCreationExpression(InstanceCreationExpression node) {
     if (entity == node.constructorName) {
       // no keywords in 'new ^' expression
     } else {
       super.visitInstanceCreationExpression(node);
@@ skipping 219 matching lines @@
         return false;
       }
       AstNode parent = body.parent;
       if (parent is ConstructorDeclaration || parent is MethodDeclaration) {
         return true;
       }
       node = parent;
     }
   }
 }