add tests of error handling for wrong types of print() kwargs

Author: silmeth

tests/snippets/print_const.py

@@ -0,0 +1,15 @@
+print(2 + 3)
+
+try:
+    print('test', end=4)
+except TypeError:
+    pass
+else:
+    assert False, "Expected TypeError on wrong type passed to end"
+
+try:
+    print('test', sep=['a'])
+except TypeError:
+    pass
+else:
+    assert False, "Expected TypeError on wrong type passed to sep"