The "haiku" theme doesn't show chapter contents in sidebar.
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
# Theme options are theme-specific and customize the look and feel of a theme
# further. For a list of options available for each theme, see the
# Theme options are theme-specific and customize the look and feel of a theme
# further. For a list of options available for each theme, see the