fix id mode persistence after filter (fix #72)

Author: aaronjanse

dots/states.py

@@ -222,12 +222,12 @@ def next(self, char):
             if self.parent.id == 0:
                 return DeadState(self.parent)
             else:
-                return self
+                return TravelState(self.parent)
         elif char == ';':
             if self.parent.id == 1:
                 return DeadState(self.parent)
             else:
-                return self
+                return TravelState(self.parent)
         else:
             return autodetect_next_state(self.parent, char)
 

test/id_mode_persistence.dots

@@ -0,0 +1,7 @@
+             "Y"$\
+             "N"$~-.
+.-#8@1@:{%}--{=}-/
+.-#3-----/    |
+              |
+.-#8@1@:-{%}--/
+.-#3------/

test/test_programs.py

@@ -128,6 +128,10 @@ def test_dots_filter_chars():
     out = check_output('filter_chars', "END\n")
     assert out == [0, 0, 1, 1]
 
+def test_dots_id_mode_persistence():
+    out = check_output('id_mode_persistence')
+    assert out == map_add_newline("Y")
+
 def test_dots_eof():
     out = check_output('eof', "hi\n")
     assert len(out) == 5