test for array with array

lib/sof/array.rb

@@ -1,7 +1,7 @@
 Array.class_eval do
   def to_sof(io , members , level)
-    each do |object|
-      io.write(" " * level)
+    each_with_index do |object , i|
+      io.write(" " * level) unless i == 0
       io.write("-")
       members.output(io , object)
       io.write("\n")

test/sof.rb

@@ -28,5 +28,9 @@ class BasicSof < MiniTest::Test
     out = Sof::Writer.write([true, 1234 , ObjectWithAttributes.new])
     assert_equal "-true\n-1234\n-ObjectWithAttributes(name: 'some object' ,number: 1234)\n\n" , out    
   end
+  def test_array_with_array
+    out = Sof::Writer.write([true, 1234 , [true , 12 ]])
+    assert_equal "-true\n-1234\n--true\n -12\n\n" , out    
+  end
 
 end