Update runtests.jl

test/runtests.jl

-
 using Semirings
 using TensorFSTs
 using TensorFSTs.LinearFSTs
@@ -171,7 +170,7 @@ end
     A = TensorFST(
         [
             (src = (1,), isym = 2, osym = 2, weight = S(2), dest = (2,)),
-			(src = (1,), isym = 3, osym = 2, weight = S(2), dest = (2,)),
+            (src = (1,), isym = 3, osym = 2, weight = S(2), dest = (2,)),
             (src = (2,), isym = 3, osym = 3, weight = S(5), dest = (4,)),
             (src = (1,), isym = 2, osym = 3, weight = S(3), dest = (3,)),
             (src = (3,), isym = 3, osym = 3, weight = S(2), dest = (4,))