#811160 in a different way.

tty opened by os.openpty() isn't always a tty according to os.isatty(), when
it's tested inside the process that opened it. Doesn't affect actual
functionality, as using a tty this way is rarely, if ever, useful. Ignoring
the failure allows the test for actual functionality to continue.

Will backport to 2.4-maint.

Expand set of errors caught in set_context().  Some new errors, some
old error messages changed for consistency.

Fixed error checking in generator expression code.  The first set of
tests were impossible condition given the grammar.  In general, the
ast code uses REQ() for those sanity checks.

Fix some error handling for augmented assignments.  As comments in the
code explain, set_context() ought to work here, but I got unexpected
crashes when I tried it.  Should come back to this.

Add note to Grammar that yield expression is a special case.

Add doctest cases for SyntaxErrors raised by ast.c.

(test cases and dbobj wrapping)

by Matt Messier).

before the listener was ready (on gentoo x86 buildslave).  This
caused the listener to not exit normally since nobody connected to it
(waited in accept()).  The exception was raised in the other thread
and the test failed.

This fix doesn't completely eliminate the race, but should make it
near impossible to trigger.  Hopefully it's good enough.

this file (the source) must be fixed.

Why isn't there a comment at the top saying the file is generated and
why are both the source and generated file checked in?  Bootstrap problem?

Will backport.

Will backport.

synchronization and termination.

this fixes the bsddb db associate tests when compiled against
BerkeleyDB 3.3 thru 4.1.  4.2 thru 4.4 already passed and still
pass.

specifications, raises IOErrors when proxies for unsupported protocols
are defined, and uses the https proxy on https redirections.

way back thru 3.2).  This should be backported to the release24-maint
branch.

- The path separator isn't "/" on Windows.

- Leaving behind a read-only file causes cascades
  of bogus failures on Windows.