No = in key or value of attr lists.

Fixes #389. Thanks for the report @lazka.

Author: waylan

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)
 ])
 

tests/extensions/attr_list.html

@@ -57,4 +57,10 @@ <h1 class="block">Definition <em>lists</em></h1>
 <dd><em class="inline">dd</em></dd>
 <dt><em class="inline">DT3</em></dt>
 <dd>Some dd</dd>
-</dl>
+</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>

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*{ === }
+