Re: [PATCH v2] automake: rewrite scan_variable_expansions regex

[Karl Berry]

    The regex pattern in function scan_variable_expansions() fails to
    report a portability warning when a dollar-escaped dollar sign
    precedes the variable:

            foo_SOURCES = a.c $$$(patsubst a.c,a,b)

Thanks much, Jan. It all worked for me. Pushed. --karl