Tweak database IDL format to print interface attributes on separate lines

client/dom/scripts/idlrenderer.py

Index: client/dom/scripts/idlrenderer.py
diff --git a/client/dom/scripts/idlrenderer.py b/client/dom/scripts/idlrenderer.py
index 0e95040db2a147cc434f0d5273420f4c498f270d..46f90c61edb661054308699831e8359301aaf600 100755
--- a/client/dom/scripts/idlrenderer.py
+++ b/client/dom/scripts/idlrenderer.py
@@ -57,14 +57,16 @@ def render(idl_node, indent_str='  '):
       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 */')