[gnome-user-docs] Fix Spanish translation header

[Piotr Drąg <piotrdrag src gnome org>]

commit 5af53d81c253bab8adcae1091ccce75a48e36c54
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Feb 24 00:23:34 2018 +0100

    Fix Spanish translation header

 gnome-help/es/es.po |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gnome-help/es/es.po b/gnome-help/es/es.po
index 734b3b7..1ae64f9 100644
--- a/gnome-help/es/es.po
+++ b/gnome-help/es/es.po
@@ -10,7 +10,7 @@
 # Milagros Alessandra Infante Montero <maim92 gmail com>, 2012.
 # 
 # 
-# Daniel Mustieles <daniel mustieles gmail com>, 2011, 2012, 2013, 2014, 2015., 2016, 2017.
+# Daniel Mustieles <daniel mustieles gmail com>, 2011-2017.
 #
 msgid ""
 msgstr ""