Fix HTML attribute regex

mistune.py

@@ -35,7 +35,7 @@
 ]
 _pre_tags = ['pre', 'script', 'style']
 _valid_end = r'(?!:/|[^\w\s@]*@)\b'
-_valid_attr = r'''\s*[a-zA-Z\-](?:\=(?:"[^"]*"|'[^']*'|\d+))*'''
+_valid_attr = r'''\s*[a-zA-Z\-](?:\=(?:"[^"]+"|'[^']+'|[^\s'">]+))?'''
 _block_tag = r'(?!(?:%s)\b)\w+%s' % ('|'.join(_inline_tags), _valid_end)
 _scheme_blacklist = ('javascript:', 'vbscript:')
 

tests/test_extra.py

@@ -69,6 +69,16 @@ def test_parse_inline_html():
     )
     assert '<span><strong>' in ret
 
+    ret = mistune.markdown(
+        '<span id="foo">**foo**</span>', parse_inline_html=True, escape=False
+    )
+    assert '<span id="foo"><strong>' in ret
+
+    ret = mistune.markdown(
+        '<span id=foo>**foo**</span>', parse_inline_html=True, escape=False
+    )
+    assert '<span id=foo><strong>' in ret
+
     ret = mistune.markdown(
         '<a>http://lepture.com</a>', parse_inline_html=True, escape=False
     )
@@ -81,11 +91,23 @@ def test_block_html():
     )
     assert '<div ></div>' in ret
 
+
 def test_parse_block_html():
     ret = mistune.markdown(
         '<div>**foo**</div>', parse_block_html=True, escape=False
     )
     assert '<div><strong>' in ret
+
+    ret = mistune.markdown(
+        '<div id="foo">**foo**</div>', parse_block_html=True, escape=False
+    )
+    assert '<div id="foo"><strong>' in ret
+
+    ret = mistune.markdown(
+        '<div id=foo>**foo**</div>', parse_block_html=True, escape=False
+    )
+    assert '<div id=foo><strong>' in ret
+
     ret = mistune.markdown(
         '<span>**foo**</span>', parse_block_html=True, escape=False
     )