fix incorrect BS usage

src/text.py

@@ -74,16 +74,13 @@ def extract_article(url):
 
 def select_content(html_code, elem_class, class_name):
     print(f'Calling select_content with {elem_class}, {class_name}')
+    kwargs = {}
     if class_name.startswith('.'):
         class_name = class_name[1:]
-        elem_id = None
+        kwargs = {'class_': class_name}
     elif class_name.startswith('#'):
-        elem_id = class_name[1:]
-        class_name = None
-    else:
-        elem_id = None
-        class_name = None
-    return md(str(BS(html_code, features="lxml").find(elem_class, class_=class_name, id=elem_id)))
+        kwargs = {'id': class_name[1:]}
+    return md(str(BS(article.html, features="lxml").find(**kwargs)))
 
 
 def split_by_heading(html_content, _i):