The convention for indentation seems to be a single tab. Help text is
further indented by an additional two whitespaces. Fix the lines that
violate these rules.

While at it, add missing trailing endif comments and squeeze multiple
empty lines.
Signed-off-by: NJuerg Haefliger <juergh@canonical.com>
Link: https://lore.kernel.org/r/20220524075848.21684-2-juergh@canonical.comSigned-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>