From f54cd8652df84d5f8655819fff0631f0fc92a2b6 Mon Sep 17 00:00:00 2001
From: Waylan Limberg <waylan.limberg@icloud.com>
Date: Tue, 24 Feb 2015 19:01:25 -0500
Subject: No `=` in key or value of attr lists.

Fixes #389. Thanks for the report @lazka.
---
 markdown/extensions/attr_list.py |  4 ++--
 tests/extensions/attr_list.html  |  8 +++++++-
 tests/extensions/attr_list.txt   | 12 ++++++++++++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/markdown/extensions/attr_list.py b/markdown/extensions/attr_list.py
index 395259a..683bdf8 100644
--- a/markdown/extensions/attr_list.py
+++ b/markdown/extensions/attr_list.py
@@ -55,8 +55,8 @@ def _handle_word(s, t):
 _scanner = Scanner([
     (r'[^ ]+=".*?"', _handle_double_quote),
     (r"[^ ]+='.*?'", _handle_single_quote),
-    (r'[^ ]+=[^ ]*', _handle_key_value),
-    (r'[^ ]+', _handle_word),
+    (r'[^ ]+=[^ =]+', _handle_key_value),
+    (r'[^ =]+', _handle_word),
     (r' ', None)
 ])
 
diff --git a/tests/extensions/attr_list.html b/tests/extensions/attr_list.html
index b76f73b..2a36dbc 100644
--- a/tests/extensions/attr_list.html
+++ b/tests/extensions/attr_list.html
@@ -57,4 +57,10 @@ And a <strong class="nest">nested <a class="linky2" href="http://example.com" ti
 <dd><em class="inline">dd</em></dd>
 <dt><em class="inline">DT3</em></dt>
 <dd>Some dd</dd>
-</dl>
\ No newline at end of file
+</dl>
+<h1>Bad attributes</h1>
+<p>Key without <em foo="foo">value</em></p>
+<p>Value without <em>key</em></p>
+<p>No <em>key or value</em></p>
+<p><em>Weirdness</em></p>
+<p><em>More weirdness</em></p>
\ No newline at end of file
diff --git a/tests/extensions/attr_list.txt b/tests/extensions/attr_list.txt
index da108e6..c2adbf4 100644
--- a/tests/extensions/attr_list.txt
+++ b/tests/extensions/attr_list.txt
@@ -76,3 +76,15 @@ DT2 {.term}
 *DT3*{.inline}
 :   Some dd
 
+# Bad attributes
+
+Key without *value*{ foo= }
+
+Value without *key*{ =bar }
+
+No *key or value*{ = }
+
+*Weirdness*{ == }
+
+*More weirdness*{ === }
+
-- 
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