pkg/http_parser: format code, prepare for +6 release

lib/src/media_type.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 http_parser.media_type;
 
 import 'package:collection/collection.dart';
 import 'package:string_scanner/string_scanner.dart';
 
 // All of the following regular expressions come from section 2.2 of the HTTP
@@ skipping 55 matching lines @@
         scanner.expect(_token);
         var attribute = scanner.lastMatch[0];
         scanner.expect('=');
 
         var value;
         if (scanner.scan(_token)) {
           value = scanner.lastMatch[0];
         } else {
           scanner.expect(_quotedString);
           var quotedString = scanner.lastMatch[0];
-          value = quotedString.substring(1, quotedString.length - 1).
-              replaceAllMapped(_quotedPair, (match) => match[1]);
+          value = quotedString
+              .substring(1, quotedString.length - 1)
+              .replaceAllMapped(_quotedPair, (match) => match[1]);
         }
 
         scanner.scan(_whitespace);
         parameters[attribute] = value;
       }
 
       scanner.expectDone();
       return new MediaType(type, subtype, parameters);
     } on FormatException catch (error) {
       throw new FormatException(
@@ skipping 44 matching lines @@
     }
 
     return new MediaType(type, subtype, parameters);
   }
 
   /// Converts the media type to a string.
   ///
   /// This will produce a valid HTTP media type.
   String toString() {
     var buffer = new StringBuffer()
-        ..write(type)
-        ..write("/")
-        ..write(subtype);
+      ..write(type)
+      ..write("/")
+      ..write(subtype);
 
     parameters.forEach((attribute, value) {
       buffer.write("; $attribute=");
       if (_nonToken.hasMatch(value)) {
         buffer
           ..write('"')
-          ..write(value.replaceAllMapped(
-              _escapedChar, (match) => "\\" + match[0]))
+          ..write(
+              value.replaceAllMapped(_escapedChar, (match) => "\\" + match[0]))
           ..write('"');
       } else {
         buffer.write(value);
       }
     });
 
     return buffer.toString();
   }
 }