12016-04-01  Paul Eggert  <eggert@cs.ucla.edu>
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3    automake: port to Perl 5.22 and later
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5    Without this change, Perl 5.22 complains "Unescaped left brace in
6    regex is deprecated" and this is planned to become a hard error in
7    Perl 5.26.  See:
8    http://search.cpan.org/dist/perl-5.22.0/pod/perldelta.pod#A_literal_%22{%22_should_now_be_escaped_in_a_pattern
9    * bin/automake.in (substitute_ac_subst_variables): Escape left brace.
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