AbbrExtension now handles abbreviations nested in other markup.

Just set each abreviation as an AtomicString. Given the nature of
abbreviations, they are not likely to ever contain any other markup
anyway. Also added a test.

Fixes #224. Thanks for the report @JakeChampion.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/test_extensions.py b/tests/test_extensions.py
index cb27a30..cce2adf 100644
--- a/tests/test_extensions.py
+++ b/tests/test_extensions.py
@@ -27,6 +27,15 @@ class TestAbbr(unittest.TestCase):
             'and a <abbr title="Abbreviation Reference">REF</abbr>. Ignore '
             'REFERENCE and ref.</p>')
 
+    def testNestedAbbr(self):
+        """ Test Nested Abbreviations. """
+        text = '[ABBR](/foo) and _ABBR_\n\n' + \
+               '*[ABBR]: Abreviation'
+        self.assertEqual(self.md.convert(text),
+            '<p><a href="/foo"><abbr title="Abreviation">ABBR</abbr></a> '
+            'and <em><abbr title="Abreviation">ABBR</abbr></em></p>')
+
+
 class TestCodeHilite(unittest.TestCase):
     """ Test codehilite extension. """