converter fix: font-size removed from footnotes

src/html_preprocessor.py

@@ -322,6 +322,15 @@ class HTMLPreprocessor:
             for tag_a in cont_tag.find_all('a', {'class': 'sdfootnotesym'}):
                 tag_a.decompose()
 
+            # remove font-size
+            for span in cont_tag.find_all('span', {'style': re.compile('font-size')}):
+                style = span.get('style')
+                style = re.sub(r"font-size: \d+px", "", style)
+                if style == '':
+                    del span.attrs['style']
+                else:
+                    span.attrs['style'] = style
+
             unicode_string = ''
             for child in cont_tag.children:
                 if type(child) is NavigableString: