diff --git a/spec/vec3_spec.lua b/spec/vec3_spec.lua
index d620eca..a4587a3 100644
--- a/spec/vec3_spec.lua
+++ b/spec/vec3_spec.lua
@@ -226,17 +226,18 @@ describe("vec3:", function()
 	end)
 
 	it("get two 3-vectors angle", function()
-    local angle_to = function(a, b)
-      local deg = math.deg(a:angle_to(b))
-      return string.format('%.2f', deg)
-    end
+		local angle_to = function(a, b)
+			local deg = math.deg(a:angle_to(b))
+			return string.format('%.2f', deg)
+		end
+
 		local a = vec3(1,2,3)
 		assert.is.equal(angle_to(a, vec3(3, 2, 1)), '44.42')
-    assert.is.equal(angle_to(a, vec3(0, 10, 0)), '57.69')
-    assert.is.equal(angle_to(a, vec3(0, -12, -10)), '157.51')
+		assert.is.equal(angle_to(a, vec3(0, 10, 0)), '57.69')
+		assert.is.equal(angle_to(a, vec3(0, -12, -10)), '157.51')
 
-    a = vec3.unit_z
-    assert.is.equal(angle_to(a, vec3(0, 10, 0)), '90.00')
+		a = vec3.unit_z
+		assert.is.equal(angle_to(a, vec3(0, 10, 0)), '90.00')
 		assert.is.equal(angle_to(a, vec3(-123, 10, 0)), '90.00')
 		assert.is.equal(angle_to(a, vec3(-10, 0, 10)), '45.00')
 		assert.is.equal(angle_to(a, vec3(-10, 0, -10)), '135.00')
@@ -244,7 +245,7 @@ describe("vec3:", function()
 		assert.is.equal(angle_to(a, vec3(0, 0, -10)), '180.00')
 		assert.is.equal(angle_to(a, vec3(0, 0, 100)), '0.00')
 
-    a = vec3(100, 100, 0)
+		a = vec3(100, 100, 0)
 		assert.is.equal(angle_to(a, vec3(0, 0, 100)), '90.00')
 		assert.is.equal(angle_to(a, vec3(0, 0, -100)), '90.00')
 		assert.is.equal(angle_to(a, vec3(-10, -10, 0)), '180.00')