Added missing 0 in testcase

Author: eicchen

pandas/tests/io/parser/usecols/test_usecols_basic.py

@@ -554,7 +554,7 @@ def test_usecols_order(all_parsers, usecols, request):
     data = """\
 a,b,c,d
 1,2,3,0
-4,5,6,
+4,5,6,0
 7,8,9,0
 10,11,12,13"""
     # print(usecols)