Explain an odd conditional check.

src/librustc/metadata/encoder.rs

@@ -388,6 +388,17 @@ fn encode_reexported_static_methods(ecx: @EncodeContext,
  match ecx.tcx.items.find(&exp.def_id.node) {
  Some(&ast_map::node_item(item, path)) => {
  let original_name = ecx.tcx.sess.str_of(item.ident);
+
+ //
+ // We don't need to reexport static methods on traits
+ // declared in the same module as our `pub use ...` since
+ // that's done when we encode the trait item.
+ //
+ // The only exception is when the reexport *changes* the
+ // name e.g. `pub use Foo = self::Bar` -- we have
+ // encoded metadata for static methods relative to Bar,
+ // but not yet for Foo.
+ //
  if mod_path != *path || *exp.name != *original_name {
  for methods.each |&m| {
  if m.explicit_self == ast::sty_static {