fix inner html + test

feed.py

@@ -17,8 +17,6 @@ def element_to_string(element):
     s = [element.text] if element.text else []
     for sub_element in element:
         s.append(etree.tostring(sub_element))
-        if sub_element.tail:
-            s.append(element.tail)
     return ''.join(s)
 
 def _build_link(html, doc_url, url):

tests.py

@@ -0,0 +1,11 @@
+from lxml import etree
+
+from feed import element_to_string
+
+def test1_get_inner_html():
+    root = etree.fromstring('<a>1<b>2</b>3<c>4</c>5</a>')
+    assert element_to_string(root) == '1<b>2</b>3<c>4</c>5'
+
+test1_get_inner_html()
+
+print 'All tests are OK'