truncate() left the stream position unchanged, which meant the
"truncated" data didn't go away:

>>> io.write('abc')
>>> io.truncate(0)
>>> io.write('xyz')
>>> io.getvalue()
'abcxyz'

Patch by Dima Dorfman.

argument is optional on both (the format string is "ss|O!").

test_queue has failed occasionally for years, and there's more than one
cause.

The primary cause in the SF report appears to be that the test driver
really needs entirely different code for thread tests that expect to
raise exceptions than for thread tests that are testing non-exceptional
blocking semantics.  So gave them entirely different code, and added a
ton of explanation.

Another cause is that the blocking thread tests relied in several places
on the difference between sleep(.1) and sleep(.2) being long enough for
the trigger thread to do its stuff sot that the blocking thread could make
progress.  That's just not reliable on a loaded machine.  Boosted the 0.2's
to 10.0's instead, which should be long enough under any non-catastrophic
system conditions.  That doesn't make the test take longer to run, the 10.0
is just how long the blocking thread is *willing* to wait for the trigger
thread to do something.  But if the Queue module is plain broken, such
tests will indeed take 10 seconds to fail now.

For similar (heavy load) reasons, changed threaded-test termination to
be willing to wait 10 seconds for the signal thread to end too.

updates as bugfixes.

* Check the found object for a None value during a contains/has_key
  lookup.  Perhaps it will help the OP who is likely suffering from an
  occassional GC or threading object deletion after self.data is checked.

* Complete the previous patch by removing the unnecessary indirection
  for weak dict iterators.  Makes the code cleaner and more readable.

It's redundant, since no output is written anyway: DebugRunner doesn't
generate any output for failures and unexpected exceptions, and since
verbose=False, it won't generate any output for non-failures either.

constant defined by the module (except the test*() functions, which
should be integrated into test/test_doctest.py, anyway).

found on old/legacy C compilers of HP-UX, IRIX and Tru64.  (Reported
by roadkill, Richard Townsend, Maik Hertha and Minsik Kim)

found on legacy C compilers of HP-UX, IRIX and Tru64.  (Reported
by roadkill, Richard Townsend, Maik Hertha and Minsik Kim)

matches to be symmetric.  This makes the algorithm easier to understand.

appeared at the end of a line.  Repaired that.  Also noted that it's
too easy to provoke this implementation into requiring exponential
time, and especially when a test fails.  I'll replace the implementation
with an always-efficient one later.

error based on decorating with staticmethod too soon for the code to execute.
This meant that if the test didn't pass it just errored out.  Now if the test
doesn't pass it leads to a failure instead.

The make_head_and_body() function used a hardcoded value for the
<link> element for the index; this patch causes the proper output
filename to be captured during the transformation phase so it can be
used during the page assembly phase.

this (which are rather ugly, but it'll have to do until test_inspect gets a
major overhaul and a conversion to unittest). Thanks Simon Percivall!