tests: apply binary mode to output in seq.py

I noticed this when playing with running tests using WSL, and iterating over the
output yielded '0\r', '1\r',...  Most of the other *.py tools do this, and `seq`
on MSYS lacks '\r' in the output, so this is more consistent.

tests/seq.py

@@ -1,27 +1,36
 #!/usr/bin/env python
 #
 # A portable replacement for 'seq'
 #
 # Usage:
 #   seq STOP              [1, STOP] stepping by 1
 #   seq START STOP        [START, STOP] stepping by 1
 #   seq START STEP STOP   [START, STOP] stepping by STEP
 
 from __future__ import absolute_import, print_function
+import os
 import sys
 
+try:
+    import msvcrt
+    msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
+    msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
+    msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)
+except ImportError:
+    pass
+
 if sys.version_info[0] >= 3:
     xrange = range
 
 start = 1
 if len(sys.argv) > 2:
     start = int(sys.argv[1])
 
 step = 1
 if len(sys.argv) > 3:
     step = int(sys.argv[2])
 
 stop = int(sys.argv[-1]) + 1
 
 for i in xrange(start, stop, step):
     print(i)