Fix POSIX footnote in tutorial.txt

diff --git a/doc/tutorial.txt b/doc/tutorial.txt
index 302fa6931254b5dcbea610179f747a51c3e68c54..14909d76a0acf73689fbe337c0dc5964158729cb 100644 (file)
--- a/doc/tutorial.txt
+++ b/doc/tutorial.txt
@@ -133,13 +133,13 @@ Ensure that the new playlist is active::
 
 The ``--`` in the ``jump_to_playlist`` command lets
 ``jump_to_playlist`` know that ``-1`` is an argument and not an
-option.  Using the bare ``--`` is a POSIX specification [#]_ supported
-by the `optparse module`_.
+option.  Using the bare ``--`` is a POSIX specification [#POSIX]_
+supported by the `optparse module`_.
 
 .. _optparse module:
   http://docs.python.org/library/optparse.html#callback-example-6-variable-arguments
 
-.. [#]: `Guideline 10 of POSIX:2008's section 12.2 <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap12.html#tag_12_02>` states:
+.. [#POSIX] `Guideline 10 of POSIX:2008's section 12.2 <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap12.html#tag_12_02>` states:
 
     "The first -- argument that is not an option-argument should be
     accepted as a delimiter indicating the end of options. Any