[Python-3000] string module trimming

[Neal Norwitz]

I whacked almost everything in the string (and strop) module.  Here
are some things left to do:

 * capwords is defined and used only in one place:
      ./idlelib/testcode.py
    ISTM, this can go.

 * maketrans remains (also implemented in stropmodule.c).  It is used 11 times.
 * ascii_letters is used 17 times
 * ascii_lowercase is used 2 times
 * digits is used 15 times
 * hexdigits is used 2 times
 * letters is used 9 times
 * whitespace is used 4 times

Some of these uses are in test code.

There are a bunch of other constants that aren't used at all in the
stdlib.  Below is the full list from my grep (which probably missed a
few uses due to from string import).

n
--
Lib/idlelib/UndoDelegator.py:   string.ascii_letters + string.digits
Lib/idlelib/AutoComplete.py:    string.ascii_letters + string.digits
Lib/idlelib/AutoComplete.py:    string.ascii_letters + string.digits
Lib/idlelib/HyperParser.py:     string.ascii_letters + string.digits
Lib/idlelib/HyperParser.py:     string.ascii_letters
Lib/idlelib/keybindingDialog.py:        string.ascii_lowercase + string.digits
Lib/idlelib/keybindingDialog.py:        string.ascii_lowercase
Lib/idlelib/PyShell.py:         string.ascii_letters + string.digits
Lib/idlelib/ScriptBinding.py:   string.ascii_letters + string.digits
Lib/idlelib/AutoExpand.py:      string.ascii_letters + string.digits
Lib/distutils/util.py:          string.whitespace
Lib/distutils/util.py:          string.whitespace
Lib/distutils/fancy_getopt.py:  string.maketrans('-', '_')
Lib/distutils/fancy_getopt.py:  string.maketrans(string.whitespace, '
' * len(string.whitespace))
Lib/bsddb/test/test_dbshelve.py:        string.letters
Lib/bsddb/test/test_get_none.py:        string.letters
Lib/bsddb/test/test_get_none.py:        string.letters
Lib/bsddb/test/test_basics.py:          string.letters
Lib/bsddb/test/test_queue.py:           string.letters
Lib/bsddb/test/test_queue.py:           string.letters
Lib/msilib/__init__.py:                 string.digits
Lib/plat-riscos/riscospath.py:          string.ascii_letters
Lib/plat-riscos/rourl2path.py:          string.maketrans("/.", "./")
Lib/test/test_csv.py:                   string.letters
Lib/test/test_pkgimport.py:             string.letters
Lib/test/test_pkgimport.py:             string.letters
Lib/test/test_md5.py:                   string.hexdigits
Lib/test/test_mimetools.py:             string.ascii_letters + string.digits
Lib/test/test_pkg.py:                   "print(__name__, 'loading');
from . import string; print(string.spam)"),
Lib/test/test_hashlib.py:               string.hexdigits
Lib/test/string_tests.py:               string.maketrans('abc', 'xyz')
Lib/test/string_tests.py:               string.maketrans
Lib/test/string_tests.py:               string.maketrans('abc', 'xyz')
Lib/test/string_tests.py:               string.maketrans('a', 'A')
Lib/test/test_urllib2.py:               string.maketrans("/.", "./"))
Lib/test/test_bigmem.py:                string.maketrans('.aZ', '-!$')
Lib/plat-mac/gensuitemodule.py:         string.ascii_letters + '_'
Lib/plat-mac/gensuitemodule.py:         string.digits
Lib/nturl2path.py:                      string.ascii_letters
Lib/pipes.py:                           string.ascii_letters + string.digits
Lib/textwrap.py:                        string.maketrans(_whitespace,
' ' * len(_whitespace))
Lib/textwrap.py:                        string.lowercase
Lib/tokenize.py:                        string.ascii_letters
Lib/ntpath.py:                          string.ascii_letters + string.digits
Lib/Cookie.py:                          string.ascii_letters + string.digits
Lib/urllib.py:                          string.maketrans("", "")
Lib/cmd.py:                             string.ascii_letters + string.digits