[libsigc++2/variadic_mem_fun2] tiny indentation fix.

[Murray Cumming <murrayc src gnome org>]

commit ac5edcf2d82b55fa83482cecbe825911e8d7c77e
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Mar 6 00:19:46 2016 +0100

    tiny indentation fix.

 sigc++/adaptors/retype.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/sigc++/adaptors/retype.h b/sigc++/adaptors/retype.h
index 66b7397..db3be85 100644
--- a/sigc++/adaptors/retype.h
+++ b/sigc++/adaptors/retype.h
@@ -64,7 +64,7 @@ struct retype_functor
   using adaptor_type = typename adapts<T_functor>::adaptor_type;
   using result_type = typename adapts<T_functor>::result_type;
 
- template <class... T_arg>
+  template <class... T_arg>
   decltype(auto)
   operator()(T_arg... _A_a)
     { return this->functor_.template operator()<type_trait_take_t<T_type>...>