Tweak database IDL format to print interface attributes on separate lines

client/dom/scripts/idlrenderer.py

 #!/usr/bin/python
 # Copyright (c) 2011, 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.
 
 from idlnode import *
 
 
 def render(idl_node, indent_str='  '):
   output = []
@@ skipping 39 matching lines @@
     elif isinstance(node, IDLModule):
       w(node.annotations)
       w(node.ext_attrs)
       wln('module %s {' % node.id)
       begin_indent()
       w(node.interfaces)
       w(node.typeDefs)
       end_indent()
       wln('};')
     elif isinstance(node, IDLInterface):
-      w(node.annotations)
-      w(node.ext_attrs)
+      wln(node.annotations)
+      wln(node.ext_attrs)
       w('interface %s' % node.id)
       begin_indent()
+      begin_indent()
       if node.parents:
         wln(' :')
         w(node.parents, ',\n')
       wln(' {')
+      end_indent()
       if node.constants:
         wln()
         wln('/* Constants */')
         w(sort(node.constants))
       if node.attributes:
         wln()
         wln('/* Attributes */')
         w(sort(node.attributes))
       if node.operations:
         wln()
@@ skipping 81 matching lines @@
       w('in ')
       if node.is_optional:
         w('optional ')
       w('%s %s' % (node.type.id, node.id))
     else:
       raise TypeError("Expected str or IDLNode but %s found" %
         type(node))
 
   w(idl_node)
   return ''.join(output)