triangle: incorrect test in some tracks

[kytrinyx]

Please check if there's a test that states that a triangle with sides 2, 4, 2 is invalid. The triangle inequality states that for any triangle, the sum of the lengths of any two sides must be greater than or equal to the length of the remaining side. If this doesn't affect this track, go ahead and just close the issue.

[jwood803]

Yep, we have that test

[kytrinyx]

Check out the discussion here: exercism/erlang#85

[kytrinyx]

There was a bit of confusion with this issue. I've summarized my current understanding here: exercism/problem-specifications#202

I am closing this issue. If necessary I will open a new issue once we have come to an agreement about how to resolve the inconsistencies and what exact steps to take.