Format all dart dev compiler files

pkg/dev_compiler/lib/src/js_ast/type_printer.dart

 // Copyright (c) 2016, 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;
 
 abstract class _TypePrinterBase implements TypeRefVisitor {
   void out(String s);
   void visit(Node node);
 
@@ skipping 20 matching lines @@
     }
   }
 
   @override
   visitQualifiedTypeRef(QualifiedTypeRef node) {
     outSeparated(".", node.path);
   }
 }
 
 abstract class TypeScriptTypePrinter extends _TypePrinterBase {
-
   void _outTypeAnnotation(TypeRef type) {
     if (type is OptionalTypeRef) {
       out("?: ");
       visit(type.type);
     } else {
       out(": ");
       visit(type);
     }
   }
 
@@ skipping 99 matching lines @@
     if (selector is LiteralString) {
       visit(node.receiver);
       out(".");
       out(selector.valueWithoutQuotes);
     } else {
       assert(false);
       out("?");
     }
   }
 
-  @override toString() => _buffer.toString();
+  @override
+  toString() => _buffer.toString();
 
   @override
   visitArrayTypeRef(ArrayTypeRef node) {
     out("Array");
     if (node.elementType != null) {
       out("<");
       visit(node.elementType);
       out(">");
     }
   }
@@ skipping 45 matching lines @@
         outSeparated(", ", node.paramTypes.values);
       }
       out(')');
       if (node.returnType != null) {
         out(":");
         visit(node.returnType);
       }
     }
   }
 }