tests/dummyssh

tests: fix readline escape characters in heredoctest.py/test-url.py

This fix mirrors the changes made to test-doctest.py in b856071435f7
and 967adcf5910d.

Without this change, tests running heredoctest.py can fail on certain
versions of OS X when TERM is set to xterm-256color:

   $ /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -m heredoctest <<EOF
   > >>> open('b', 'w').write('this' * 1000)
   > EOF
+  \x1b[?1034h (no-eol) (esc)

A similar problem occurs with test-url.py:

  $ ./run-tests.py test-url.py

  --- .../tests/test-url.py.out
  +++ .../tests/test-url.py.err
  @@ -0,0 +1 @@
  +
  ERROR: .../test-url.py output changed
  !
  Failed test-url.py: output changed
  # Ran 1 tests, 0 skipped, 1 failed.

#!/usr/bin/env python

import sys
import os

os.chdir(os.getenv('TESTTMP'))

if sys.argv[1] != "user@dummy":
    sys.exit(-1)

os.environ["SSH_CLIENT"] = "127.0.0.1 1 2"

log = open("dummylog", "ab")
log.write("Got arguments")
for i, arg in enumerate(sys.argv[1:]):
    log.write(" %d:%s" % (i+1, arg))
log.write("\n")
log.close()
r = os.system(sys.argv[2])
sys.exit(bool(r))