Tkinter classes.
Adjust a lot of docstrings.
Convert a few type checks to use isinstance() instead of type().
This is part of SF patch #485959.

but compiles OK.

Jack: I hope I didn't break anything for you!

Untabified.

[ #429329 ] actual-parameters *arg, **kws not doc'd

at present.

for "online" (as opposed to typeset) formats.

Converted to use "".startswith() to avoid slicing (& temp string creation).

docstring.
This closes SF bug #485794.


Additional (very) small details were added.

on the return values from isleap().  Also checks firstweekday() and
setfirstweekday().

The cause seems to be that when a file URL doesn't exist,
urllib.urlopen() raises OSError instead of IOError.  Simply add this
to the except clause.  Not elegant, but effective. :-)

a little.

that still fails under -Qnew, and is so tied to details of current
behavior that fixing it before new division becomes the default is
impractical.

Minor, but generates slightly smaller HTML & makes it easier to see what's
happening when debugging the HTML.

>
> When using 'distutils' (shipped with Python 2.1) I've found that my
> Python scripts installed with a first line of:
>
> #!/usr/bin/python2.1None
>
> This is caused by distutils trying to patch the first line of the python
> script to use the current interpreter.

delivered bizarre results.  Check float_divmod for a Py_NotImplemented
return and pass it along (instead of treating Py_NotImplemented as a
2-tuple).
CONVERT_TO_DOUBLE:  Added comments; this macro is obscure.

division functions, and rename to float_floor_div.

an object's deallocator, including an example of how to do this.

PyDict_UpdateFromSeq2():  removed it.
PyDict_MergeFromSeq2():  made it public and documented it.
PyDict_Merge() docs:  updated to reveal <wink> that the second
argument can be any mapping object.