epub converter: add comments removal

src/html_epub_preprocessor.py

@@ -3,7 +3,7 @@ import pathlib
 import re
 from typing import List, Tuple
 
-from bs4 import BeautifulSoup, NavigableString, Tag
+from bs4 import BeautifulSoup, NavigableString, Tag, Comment
 
 from access import Access
 from livecarta_config import LawCartaConfig
@@ -538,7 +538,10 @@ def prepare_title_and_content(title, chapter_tag: BeautifulSoup, remove_title_fr
         if hasattr(tag, 'attrs') and tag.attrs.get('class') and (tag.attrs.get('class') not in ['link-anchor',
                                                                                                 'footnote-element']):
             del tag.attrs['class']
-
+    # 3. comments removal
+    comments = chapter_tag.findAll(text=lambda text: isinstance(text, Comment))
+    for comment in comments:
+        comment.extract()
     # content_str = re.sub(r'([\n\t\xa0])', ' ', str(content_tag))
     title_str = clean_title_from_numbering(title_str)
     return title_str, str(chapter_tag)