test_string and test_userstring run same tests for string methods

have already been checked in)

UNTESTED!

   for #100836, but implemented in a different way)

to match addition to test_unicode.py.

  There is a silly bug in the fall-back dumbdbm.py database package in
  the Python 1.5.2 standard distro. This bug causes any changes to an
  existing item to generate a new key, even when the key already
  exists.  After many updates, the .dir file used by dumbdbm grows to
  a huge size, and can cause filesystem problems.

added excplicit node * parameter to termvalid argument in
validate_two_chain_ops of parsermodule.c (as proposed by fred)

an attribute value was not escaped, you could get two syntax errors:
one about a missing semicolon and one about an unknown entity.  Now
you get only one about a bogus ampersand.

conditionally in the code.

(cf. the rest of the headers in the distribution)

  (write, read, ...), based on feedback from GvR.

- added tuple-swapping code to popen2.py

- fixed some runaway indentation in posixmodule.c

  checked for the wrong exception.  my fault.  sorry.
  (first reported by Alex Coventry)

variable.  This crushes another memory leak.  Slight rewrite
included.

font-locking.  This complets the merge with Mailman's version.

  (the PYTHONHOMEHELP define)

- ANSI-fication
  (patch #100794 by Peter Schneider-Kamp)

  (patch #100805 by Peter Schneider-Kamp)

uses the BrowserControl module.

BrowserControl is not removed to allow IDLE to be distributed separately
and still be used with Python 1.5.2.

  windows.

- added optional mode argument to popen2/popen3
  for unix; if the second argument is an integer,
  it's assumed to be the buffer size.

- changed nt.popen2/popen3/popen4 return values
  to match the popen2 module (stdout first, not
  stdin).

  for the moment, this argument must be left out or set
  to -1 (only the default bufsize is supported, that is)