codec to test all charmap codec features.

As side-effect of moving the test codec into a new module, the encodings
package codec import mechanism is checked as well.

without a name when the optional tagname arg isn't specified.  Was
actually creating a mapping with an empty string as the name.

    Wasn't built on Windows; not in config.c either.
    Module init function missing DL_EXPORT magic.
    test_xreadline output file obviously wrong (started w/ "test_xrl").
    test program very unclear about what was expected.

documentation was written by Jeff Epler (thanks!).

Resurrected Small Carbon Python as a target in PythonStandSmall. Still no GUSI, though, so no socket/select/threads.

Carbon defines {Get,Set}ControlDataHandle, so unfortunately our variants on {Get,Set}ControlData have gotten an underscore: GetControlData_Handle, etc.

Carbon defines {Get,Set}ControlDataHandle, so unfortunately our variants on {Get,Set}ControlData have gotten an underscore: GetControlData_Handle, etc. This is an incompatible change:-(

Various tweaks to make it everything build and compile again under carbon. Mainly greylisted functions.

to the Global Module Index for a set of documents.  This is used to include
a reference to the global index from the per-document module indexes, so
that it is just a little easier to find.

(Someone suggested this, but I do not remember who.  Please let me know if
it was you -- thanks!)

the xreadlines module and lets it do its thing.)

changes for safety and tuning.

Clarify the handling of characters following backslashes in raw strings.

Moved the mutex docs to be adjacent to the sched docs, since these are
meant to be used together (if they are used at all!).

   os.pathsep

    encounters a string with an unmatched quote, by adding a check for
    EOF in the 'quotes' state.

#127718: '@' and '`' seem to be confused.

a fallback for TELL64.  Fixes SF Bug #128119.

including "tmpfile" in the posix_methods[] array is wrong -- should be
HAVE_TMPFILE, not HAVE_TMPNAM.

requiring the whole option to be typed out.

This closes SF bug #126863.

the constructor.

                  Unicode); raise TypeError if not.

This closes SF bug #126866.

Tim discovered another "bug" in my get_line() code: while the comments
said that n<0 was invalid, it was in fact still called with n<0 (when
PyFile_GetLine() was called with n<0).  In that case fortunately
executed the same code as for n==0.

Changed the comment to admit this fact, and changed Tim's MS speed
hack code to use 'n <= 0' as the criteria for the speed hack.