Added test for cut without feed, fixed raw code for it

src/escpos/escpos.py

@@ -587,8 +587,12 @@ class Escpos(object):
         :param feed: print and feed before cutting. default: true
         :raises ValueError: if mode not in ('FULL', 'PART')
         """
-        if feed:
-            self.print_and_feed(6)
+
+        if not feed:
+            self._raw(GS + b'V' + six.int2byte(66) + b'\x00')
+            return
+
+        self.print_and_feed(6)
 
         mode = mode.upper()
         if mode not in ('FULL', 'PART'):

test/test_function_cut.py

@@ -0,0 +1,17 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import six
+
+import escpos.printer as printer
+from escpos.constants import GS
+
+
+def test_cut_without_feed():
+    """Test cut without feeding paper"""
+    instance = printer.Dummy()
+    instance.cut(feed=False)
+    expected = GS + b'V' + six.int2byte(66) + b'\x00'
+    assert(instance.output == expected)