Fix "span_text not defined" warning

Author: denizsafak

abogen/book_parser.py

@@ -607,8 +607,8 @@ def _extract_nav_li_title(self, li_element, link_element=None, span_element=None
 
         # Second fallback: if we have a span but title is still empty, try span text again
         # (covered by logic above mostly, but mirroring original logic's intense fallback)
-        if (not title.strip() or title == "Untitled Section") and span_text:
-            title = span_text.get_text(strip=True) or title
+        if (not title.strip() or title == "Untitled Section") and span_element:
+            title = span_element.get_text(strip=True) or title
 
         return title