More spelling fixes

utils/math.lua

@@ -31,8 +31,8 @@ math.clamp = function(num, min, max)
 end
 
 --- Takes two points and calculates the slope of a line
--- @param x1, y1 numbers - cordinates of a point on a line
--- @param x2, y2 numbers - cordinates of a point on a line
+-- @param x1, y1 numbers - coordinates of a point on a line
+-- @param x2, y2 numbers - coordinates of a point on a line
 -- @return number - the slope of the line
 math.calculate_slope = function(x1, y1, x2, y2)
     return math.abs((y2 - y1) / (x2 - x1))