we need to test TextWrapper._split().

into /--foo-/bar/ rather than /--/foo-/bar/.  Needed for Optik and
Docutils to handle Unix-style command-line options properly.

unittest.makeSuite() rather than loader.loadTestsFromTestCase().

trailing whitespace.

Expand the example to show some actual test functions, and a setUp()
and tearDown() method.

of dummy_test_TemporaryFile class; when NamedTemporaryFile and
TemporaryFile are the same, simply don't add a test suite for
TemporaryFile.

test_main() that creates a suite and runs it.  Don't mess with sys.path!!!

em-dashes -- like this -- properly.  (Also--like this.  Although this
usage may be incompatible with fixing bug #596434; we shall see.)

suite merging all test cases.

(tests) from test_funky_punc() to test_break_long() and
test_long_words() to test_nobreak_long().

base class (WrapperTestCase) instead, and call it repeatedly in the
methods that used to have a loop-over-subcases.  Much simpler.

Rename perennial temp variable 't' to 'text'.

for-loops) in test_simple(), test_wrap_short() test_hyphenated(), and
test_funky_punc().

Remove some useless comments (redundant, or info presumably available in
  PyUnit docs).

  *  lowercase test*() methods
  * define test_main() and use it instead of unittest.main()
Kill #! line.
Improve some test names and docstrings.

<peter@engcorp.com> based on a test script that's been kicking around my
home directory for a couple of months now and only saw the light of day
because I included it when I sent textwrap.py to python-dev for review.

598097)

than raising TypeError when the other argument is not a BaseSet.  This
made it necessary to separate the implementation of e.g. __or__ from
the union method; the latter should not return NotImplemented but
raise TypeError.  This is accomplished by making union(self, other)
return self|other, etc.; Python's binary operator machinery will raise
TypeError.

The idea behind this change is to allow other set implementations with
an incompatible internal structure; these can provide union (etc.) with
standard sets by implementing __ror__ etc.

I wish I could do this for comparisons too, but the default comparison
implementation allows comparing anything to anything else (returning
false); we don't want that (at least the test suite makes sure
e.g. Set()==42 raises TypeError).  That's probably fine; otherwise
other set implementations would be constrained to implementing a hash
that's compatible with ours.

be able to locate this information without knowing the PEP number.

completely equivalent.

Closes SF feature request #588768.

           changed to use universal newlines.

           Remove all imports from the compile() function; these are
           now done at the top of the module ("Python normal form"),
           and define a helper based on the platform instead of
           testing the platform in the compile() function.

order in which form variables should be encoded in a request, a CGI script
should not rely on that since a client may not conform to those specs, or
they may not be relevant to the request.
Closes SF bug #596866.

elements are hashable, so we can use dict.update() or dict.copy()
for a C speed Set.copy().

Though slightly slower, has better clarity and teaching value.

superficial errors and one deep one that aren't currently caught.  I'm
headed for bed after this checkin.

- Fixed several typos introduced by Raymond Hettinger (through
  cut-n-paste from my template): it's _as_temporarily_immutable, not
  _as_temporary_immutable, and moreover when the element is added, we
  should use _as_immutable.

- Made the seq argument to ImmutableSet.__init__ optional, so we can
  write ImmutableSet() to create an immutable empty set.

- Rename the seq argument to Set and ImmutableSet to iterable.

- Add a Set.__hash__ method that raises a TypeError.  We inherit a
  default __hash__ implementation from object, and we don't want that.
  We can then catch this in update(), so that
  e.g. s.update([Set([1])]) will transform the Set([1]) to
  ImmutableSet([1]).

- Added the dance to catch TypeError and try _as_immutable in the
  constructors too (by calling _update()).  This is needed so that
  Set([Set([1])]) is correctly interpreted as
  Set([ImmutableSet([1])]).  (I was puzzled by a side effect of this
  and the inherited __hash__ when comparing two sets of sets while
  testing different powerset implementations: the Set element passed
  to a Set constructor wasn't transformed to an ImmutableSet, and then
  the dictionary didn't believe the Set found in one dict it was the
  same as ImmutableSet in the other, because the hashes were
  different.)

- Refactored Set.update() and both __init__() methods; moved the body
  of update() into BaseSet as _update(), and call this from __init__()
  and update().

- Changed the NotImplementedError in BaseSet.__init__ to TypeError,
  both for consistency with basestring() and because we have to use
  TypeError when denying Set.__hash__.  Together those provide
  sufficient evidence that an unimplemented method needs to raise
  TypeError.

possible API improvements.

Gains a 5:1 speed-up for membership testing by
handling the most common case first (the case
where the element is hashable).

Closes SF Patch 597444.