Fix minor changes on introduction.po

Author: raulcd

dict

@@ -26,6 +26,7 @@ scripting
 scripts
 shell
 sockets
+subíndices
 sys
 tipado
 tty

tutorial/introduction.po

@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: Python 3.7\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2019-05-06 11:59-0400\n"
-"PO-Revision-Date: 2019-05-09 14:58-0400\n"
+"PO-Revision-Date: 2019-05-09 15:10-0400\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
@@ -119,7 +119,7 @@ msgid ""
 "With Python, it is possible to use the ``**`` operator to calculate powers "
 "[#]_::"
 msgstr ""
-"Con Python, es posible usar el operador ``**``para calcular potencias [#]_::"
+"Con Python, es posible usar el operador ``**`` para calcular potencias [#]_::"
 
 #: ../Doc/tutorial/introduction.rst:86
 msgid ""
@@ -426,7 +426,7 @@ msgstr "Literales de cadena que tienen expresiones embebidas."
 
 #: ../Doc/tutorial/introduction.rst:365
 msgid ":ref:`formatstrings`"
-msgstr "::ref:`formatstrings`"
+msgstr ":ref:`formatstrings`"
 
 #: ../Doc/tutorial/introduction.rst:365
 msgid "Information about string formatting with :meth:`str.format`."