FIX: Fix bug in pure_nash

[QBatista]

Should we use action_profile instead of action to be consistent with the type?

Close #73

[oyamad]

The added is_nash doesn't have tol. Will you incorporate this PR into #74 (and close this)?

Should we use action_profile instead of action to be consistent with the type?

Yes, good point.

We don't need a docstring for this method: the general N case already covers this case.

[oyamad]

• Don't put this test in test_normal_form_game.jl.
• [(3,)] -> [(n,)]

[codecov-io]

Codecov Report

Merging #75 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #75      +/-   ##
=========================================
+ Coverage   94.28%   94.3%   +0.01%     
=========================================
  Files           5       5              
  Lines         350     351       +1     
=========================================
+ Hits          330     331       +1     
  Misses         20      20

Impacted Files	Coverage Δ
src/normal_form_game.jl	92.3% <100%> (+0.06%)	⬆️

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[coveralls]

Coverage increased (+0.02%) to 94.302% when pulling c91a515 on pure_nash_bug into b47bc1b on master.