core: move comments with description of C file to top of files

src/plugins/python/weechat-python-api.c

@@ -1,4 +1,6 @@
 /*
+ * weechat-python-api.c - python API functions
+ *
  * Copyright (C) 2003-2012 Sebastien Helleu <flashcode@flashtux.org>
  * Copyright (C) 2005-2007 Emmanuel Bouthenot <kolter@openics.org>
  * Copyright (C) 2012 Simon Arlott
@@ -19,10 +21,6 @@
  * along with WeeChat.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-/*
- * weechat-python-api.c: python API functions
- */
-
 #undef _
 
 #include <Python.h>