Index: src/lxml/html/diff.py
===================================================================
--- src/lxml/html/diff.py	（版本 52472）
+++ src/lxml/html/diff.py	（工作副本）
@@ -310,8 +310,8 @@
         endtag = chunk[1] == '/'
         name = chunk.split()[0].strip('<>/')
         if name in empty_tags:
-            assert not endtag, (
-                "Empty tag %r should have no end tag" % chunk)
+#            assert not endtag, (
+#                "Empty tag %r should have no end tag" % chunk)
             balanced.append(chunk)
             continue
         if endtag:
@@ -669,16 +669,15 @@
             yield ('img', el.attrib['src'], start_tag(el))
         else:
             yield start_tag(el)
-    if el.tag in empty_tags and not el.text and not len(el):
-        return
-    start_words = split_words(el.text)
-    for word in start_words:
-        yield cgi.escape(word)
-    for child in el:
-        for item in flatten_el(child, include_hrefs=include_hrefs):
-            yield item
-    if el.tag == 'a' and el.attrib.get('href') and include_hrefs:
-        yield ('href', el.attrib['href'])
+    if not (el.tag in empty_tags and not el.text and not len(el)):
+        start_words = split_words(el.text)
+        for word in start_words:
+            yield cgi.escape(word)
+        for child in el:
+            for item in flatten_el(child, include_hrefs=include_hrefs):
+                yield item
+        if el.tag == 'a' and el.attrib.get('href') and include_hrefs:
+            yield ('href', el.attrib['href'])
     if not skip_tag:
         yield end_tag(el)
         end_words = split_words(el.tail)