md_tw.py: Add `TWBlockLexer.parse_fences`.

* md_tw.py (TWBlockLexer.parse_fences): New method.
* tests/data/blexer-fences.md: New file.
* tests/test_md_tw.py (test_parse_fences): New test.

1 files changed, 7 insertions, 0 deletions

diff --git a/md_tw.py b/md_tw.py
index 7cb203b..218d324 100644
--- a/md_tw.py
+++ b/md_tw.py
@@ -45,6 +45,13 @@ class TWBlockLexer(mistune.BlockLexer):
             'text': m.group(0),
         })
 
+    def parse_fences(self, m):
+        self.tokens.append({
+            'type': 'code',
+            'lang': None,
+            'text': m.group(0),
+        })
+
 
 class TWInlineLexer(mistune.InlineLexer):
     """Text Wrap Inline level lexer for inline gramars."""