Indent rule commands consistently with a TAB. * lib/am/check.am ($(TEST_SUITE_LOG)): Consistently use TAB, not spaces, for indentation of commands, even if indentation may not be needed at all. * lib/am/texinfos.am (install-info-am): Likewise. * THANKS: Update. Prompted by report from John Calcote. Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>