Fixed tables of contents where headings appear at more significant levels (with
lower level values) than the minimum level, potentially interrupting the
occurrence of relevant headings.
1 = Level 1 =
2 Text
3 == Level 2 Heading ==
4 Text
5 Not == a heading ==
6 == Not a heading == either
7 = Mismatched heading ==
8 == Another mismatched heading =
9 === Heading __Underlined__ ===