WITHIN() has exclusionary edges: is(1,within(0,1)) fails

[hbmaclean]

within() considers the range boundaries to be NOT within. Under the covers, Test2::Tools::Compare->within() indirectly calls Test2::Compare::Float->verify(), which compares with < and >, rather than <= and >=.

Is this intended? In any case, please document the behavior.

Demonstration:

use Test2::V0;
is(55, within(54,1),      'on upper edge');
is(53, within(54,1),      'on lower edge');
is(55, within(54,2),      'wholly within range');
is(53, within(54,2),      'wholly within range');
is(55, within(54,1.0001), 'barely within range (workaround)');
is(53, within(54,1.0001), 'barely within range (workaround)');
done_testing();

# prove -v within.t

not ok 1 - on upper edge

# Failed test 'on upper edge'
# at within.t line 2.
# +-----+----+----------+-----+
# | GOT | OP | CHECK    | LNs |
# +-----+----+----------+-----+
# | 55  | == | 54 +/- 1 | 2   |
# +-----+----+----------+-----+
not ok 2 - on lower edge
ok 3 - wholly within range
ok 4 - wholly within range
ok 5 - barely within range (workaround)

# Failed test 'on lower edge'
# at within.t line 3.
# +-----+----+----------+-----+
# | GOT | OP | CHECK    | LNs |
# +-----+----+----------+-----+
# | 53  | == | 54 +/- 1 | 3   |
# +-----+----+----------+-----+
ok 6 - barely within range (workaround)