bug#77891: Typo documentation fix

Karl Berry <[email protected]> Fri, 18 Apr 2025 15:30:38 -0600

Newsgroups	gmane.comp.sysutils.automake.bugs
Message-ID	<[email protected]>

    -# developer- defined test setup AM_TESTS_ENVIRONMENT (if any), and
    +# developer-defined test setup AM_TESTS_ENVIRONMENT (if any), and

Thanks Reuben. I applied it. -k