Updated README again

exercises/triangle/README.md

 
 An _equilateral_ triangle has all three sides the same length.
 
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-An _isosceles_ triangle has at least two sides the same length. (It is sometimes
-specified as having exactly two sides the same length, but for the purposes of
-this exercise we'll say at least two.)
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 An _isosceles_ triangle has at least two sides the same length.
->>>>>>> Matched new README formatting
 
 A _scalene_ triangle has all sides of different lengths.