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.
[ original upstream message ]