[gnome-boxes] Fix Spanish translation header

[Piotr Drąg <piotrdrag src gnome org>]

commit 039c9cccb979a7a1da6a9aed43a2f25b1f468c74
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Feb 23 23:24:51 2018 +0100

    Fix Spanish translation header

 help/es/es.po | 2 +-
 po/es.po      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/help/es/es.po b/help/es/es.po
index c95fccd3..273c0e45 100644
--- a/help/es/es.po
+++ b/help/es/es.po
@@ -4,7 +4,7 @@
 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 # Alex Puchades <alex94puchades gmail com>, 2015.
 # 
-# Daniel Mustieles <daniel mustieles gmail com>, 2014, 2015., 2017.
+# Daniel Mustieles <daniel mustieles gmail com>, 2014, 2015, 2017.
 #
 msgid ""
 msgstr ""
diff --git a/po/es.po b/po/es.po
index 094d57b6..769a6ece 100644
--- a/po/es.po
+++ b/po/es.po
@@ -2,7 +2,7 @@
 # Copyright (C) 2012 gnome-boxes's COPYRIGHT HOLDER
 # This file is distributed under the same license as the gnome-boxes package.
 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
-# Daniel Mustieles <daniel mustieles gmail com>, 2012, 2013, 2014, 2015, 2016, 2017, 2018.
+# Daniel Mustieles <daniel mustieles gmail com>, 2012-2018.
 #
 msgid ""
 msgstr ""