@heading and friends are unaffected by @lowersections. One would expect
the following to output Foo and Bar at the same sectioning level, as is
the case without the @lowersections command:
\input texinfo
@setfilename test.info
@settitle test
@lowersections
@section Foo
@heading Bar
@bye
However, Bar is output one level higher than Foo. This is easy to see in
the HTML produced by texi2any --html --no-split, where Foo uses <h4> and
Bar uses <h3>. This happens with texi2any (GNU texinfo) 6.0 and 5.2, but
it seems to work properly on an older makeinfo (GNU texinfo) 4.13.
Quinn Grier
