[baobab] Fix Spanish translation header

[Piotr Drąg <piotrdrag src gnome org>]

commit 186f95314ba9da3ed1fd76b8eeb182b6f13cdc83
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Feb 23 20:21:38 2018 +0100

    Fix Spanish translation header

 help/es/es.po |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/es/es.po b/help/es/es.po
index 47cc21b..839b78f 100644
--- a/help/es/es.po
+++ b/help/es/es.po
@@ -3,7 +3,7 @@
 # translation of baobab manual into spanish
 # Jorge González <jorgegonz svn gnome org>, 2007, 2008, 2011.
 # 
-# Daniel Mustieles <daniel mustieles gmail com>, 2012, 2013, 2014, 2015., 2017.
+# Daniel Mustieles <daniel mustieles gmail com>, 2012-2015, 2017.
 #
 msgid ""
 msgstr ""