Improve doc; add Bit.set and unset methods

tests/test_bit.py

@@ -64,6 +64,24 @@ class TestBit(TestCase):
         var.toggle()
         self.assertTrue(var, "Bit(False).toggle() == True")
 
+    def test_set(self):
+        """Test the set() method"""
+        var = Bit(False)
+        var.set()
+        self.assertTrue(var, "Bit(False).set() == True")
+        var = Bit(True)
+        var.set()
+        self.assertTrue(var, "Bit(True).set() == True")
+
+    def test_unset(self):
+        """Test the unset() method"""
+        var = Bit(True)
+        var.unset()
+        self.assertFalse(var, "Bit(True).unset() == False")
+        var = Bit(False)
+        var.unset()
+        self.assertFalse(var, "Bit(False).unset() == False")
+
     def test_errors(self):
         """
         Test that errors are raised for invalid values