t/core.t may fail (scientific notation issue)

[eserte]

I just got a test failure looking like this:

    #   Failed test 'fake_pick evaluated options as expected'
    #   at t/core.t line 21.
    #                   '1.91884176530266e-05'
    #     doesn't match '(?^:^(?:0\.\d+|\d\d)$)'
    # Looks like you failed 1 test of 20.

#   Failed test 'fake_pick'
#   at t/core.t line 24.
# Looks like you failed 1 test of 12.
t/core.t ............... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/12 subtests