Well, I at least ran test_porting after making that ‘only doc’ change!
But then I committed with -a by mistake. Oh well.
BEGIN { require './test.pl'; }
-plan(361);
+plan(360);
run_tests() unless caller;
like ($@, $FATAL_MSG);
is(substr($a,0,-6), 'abc'); # P=Q R S
is(substr($a,-3,1), 'x'); # P Q R S
-sub{$b = shift}->(substr($a,999,999));
-is ($w--, 1, 'boundless lvalue substr only warns on fetch');
substr($a,3,3) = 'XYZ';
is($a, 'abcXYZxyz' );