Strip footnote anchors from auto ToC (#777)

Problem occurs if chapter heading has FN anchor.

Because only one anchor can be linked from a footnote,
this should be the one in the chapter heading itself, not
one in the Autogenerated ToC.

Fixes #775

src/guiguts/html_convert.py

@@ -685,6 +685,8 @@ def reset_ibs_dict() -> None:
                 maintext().replace(
                     f"{line_start}-2l lineend", f"{line_start}-1l lineend", "</h2>\n"
                 )
+                # Don't want footnote anchors in auto ToC
+                chap_heading = re.sub(r"\[.{1,5}\]", "", chap_heading)
                 auto_toc += f'<a href="#{chap_id}">{chap_heading}</a><br>\n'
                 in_chap_heading = False
             continue