Added _test() that behaves (a bit) like gzip.
Fix a comment (*sequential* access is okay -- *random* access it out!)

patches provided by Greg (am I glad I sent him my latest version!).

input.  When an EOF is read, break out of the loop instead of (by
default) writing an empty line (which doesn't do much good).  Don't
close self when falling through the loop.

 *  The invoke methods of the three Tkinter widgets Button,
    Checkbutton and Radiobutton should return the value returned by
    the callback, (like the Menu widget does):

	def invoke(self):
	    return self.tk.call(self._w, 'invoke')

 *  The select_from method of the Canvas widget should use 'from', not
    'set':

	def select_from(self, tagOrId, index):
	    self.tk.call(self._w, 'select', 'from', tagOrId, index)

    Currently, if you use select_from, you get the error message:
 'TclError: bad select option "set": must be adjust, clear, from, item, or to'

 *  The 'entrycget' and 'type' methods of the Tk menu widget are
    missing from Tkinter.

 *  There is a bug in grid_columnconfigure and grid_rowconfigure.  For
    example, this should return the current value of the 'minsize'
    option for column 0:

	f.grid_columnconfigure(0, 'minsize')

    Instead it returns the same as:

	f.grid_columnconfigure(0)

    I suggest that the hint given in the comment in the
    Tkinter.Misc.configure method should be followed - "ought to
    generalize this so tag_config etc.  can use it".  Repeating the
    same configure code several times in Tkinter is inviting errors.
    [I did not follow this advice --G]

 *  The grid_slaves method should handle options.  Currently, to pass
    options to the grid_slaves method, you have to do something like:

	grid_slaves('-row', 1)

and a little editing my me).