js_ast: Avoid precedence issue with negative numbers as receivers at calls

pkg/js_ast/lib/src/printer.dart

 // Copyright (c) 2012, 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.
 
 part of js_ast;
 
 
 typedef String Renamer(Name);
 
 class JavaScriptPrintingOptions {
@@ skipping 915 matching lines @@
   @override
   void visitAccess(PropertyAccess access) {
     visitNestedExpression(access.receiver, CALL,
                           newInForInit: inForInit,
                           newAtStatementBegin: atStatementBegin);
     Node selector = access.selector;
     if (selector is LiteralString) {
       LiteralString selectorString = selector;
       String fieldWithQuotes = selectorString.value;
       if (isValidJavaScriptId(fieldWithQuotes)) {
-        if (access.receiver is LiteralNumber) out(" ", isWhitespace: true);
+        if (access.receiver is LiteralNumber &&
+            lastCharCode != charCodes.$CLOSE_PAREN) {
+          out(" ", isWhitespace: true);
+        }
         out(".");
         startNode(selector);
         out(fieldWithQuotes.substring(1, fieldWithQuotes.length - 1));
         endNode(selector);
         return;
       }
     } else if (selector is Name) {
-      if (access.receiver is LiteralNumber) out(" ", isWhitespace: true);
+      if (access.receiver is LiteralNumber &&
+          lastCharCode != charCodes.$CLOSE_PAREN) {
+        out(" ", isWhitespace: true);
+      }
       out(".");
       startNode(selector);
       selector.accept(this);
       endNode(selector);
       return;
     }
     out("[");
     visitNestedExpression(selector, EXPRESSION,
                           newInForInit: false, newAtStatementBegin: false);
     out("]");
@@ skipping 525 matching lines @@
       context.enterNode(node, position);
     }
   }
 
   EnterExitNode exitNode(JavaScriptPrintingContext context, int position) {
     // Enter must happen before exit.
     addToNode(context, position);
     context.exitNode(node, startPosition, position, closingPosition);
     return parent;
   }
-}
+}