Test suite gives misleading guideline for --match

[sshine]

When stack test fails, a part of its output is:

Failures:

  test/Tests.hs:20:23: 
  1) isLeapYear 1996 - year divisible by 4, not divisible by 100: leap year
       expected: True
        but got: False

  To rerun use: --match "/isLeapYear/1996 - year divisible by 4, not divisible by 100: leap year/"

Randomized with seed 625767475

The hint to use --match ... has two flaws:

• This must be done via stack test --ta '--match ...'
• It should be enough to do stack test --ta '--match 1996'