Fixed #14540 -- Added Porto-Rico specific formats

Thanks rosarior for the report and the file proposal.

django/conf/locale/es_PR/formats.py

@@ -0,0 +1,30 @@
+# -*- encoding: utf-8 -*-
+# This file is distributed under the same license as the Django package.
+#
+from __future__ import unicode_literals
+
+DATE_FORMAT = r'j \d\e F \d\e Y'
+TIME_FORMAT = 'H:i:s'
+DATETIME_FORMAT = r'j \d\e F \d\e Y \a \l\a\s H:i'
+YEAR_MONTH_FORMAT = r'F \d\e Y'
+MONTH_DAY_FORMAT = r'j \d\e F'
+SHORT_DATE_FORMAT = 'd/m/Y'
+SHORT_DATETIME_FORMAT = 'd/m/Y H:i'
+FIRST_DAY_OF_WEEK = 0 # Sunday
+
+DATE_INPUT_FORMATS = (
+    # '31/12/2009', '31/12/09'
+    '%d/%m/%Y', '%d/%m/%y'
+)
+DATETIME_INPUT_FORMATS = (
+    '%d/%m/%Y %H:%M:%S',
+    '%d/%m/%Y %H:%M:%S.%f',
+    '%d/%m/%Y %H:%M',
+    '%d/%m/%y %H:%M:%S',
+    '%d/%m/%y %H:%M:%S.%f',
+    '%d/%m/%y %H:%M',
+)
+
+DECIMAL_SEPARATOR = '.'
+THOUSAND_SEPARATOR = ','
+NUMBER_GROUPING = 3