[ 1180997 ] lax error-checking in new-in-2.4 marshal stuff

which I'd assigned to Martin, but actually turned out to be easy to fix.

Also, a test.

marshal_loads.

Bugfix candidate.

   the Untabify command.
2. Corrected "tab/space" Error Dialog to show correct menu for Untabify.
   Patch 1196980 Jeff Shute

M EditorWindow.py
M NEWS.txt
M ScriptBinding.py

   New files are colorized by default, and colorizing is removed when
   saving as non-Python files. Patch 1196895 Jeff Shute
   Closes Python Bugs 775012 and 800432, partial fix IDLEfork 763524

2. Update help.txt for left/right word delete

M CREDITS.txt
M ColorDelegator.py
M EditorWindow.py
M NEWS.txt
M help.txt

this module in Jan 1994, but still documented.

Should significantly enhance the utility of the module by supporting
the creation of tools that modify the token stream and writeback the
modified result.

with C++.

[Bug #1200134] Fix buffer overflow by constraining size of .getstr(), .instr() to size of allocated buffer

[Patch #1002763] Allow long ints as terminator values; also, treat a terminator of 0 like the empty string or None

[Bug #1074261, patch #1074381] Restrict the size of chunks read from the file in order to avoid overflow or huge memory consumption.  Patch by Mark Eichin

[Patch #1171487, bug #1170331] Fix error in base64.b32decode when encoding a single null byte; test a null byte in all encodings to be sure it works

present.

[Bug #1172763] dumbdbm uses eval() on lines, so it chokes if there's an extra \r on the end of a line; fixed by stripping off trailing whitespace.

arguments (left, right) like any sane comparison function.  no need to
pass in the db object as an argument.

for them in a roundabout way (catching and parsing stderr)

keeps test output clean.

DBError was supposed to be raised.

needs backport to 2.4.x and possibly 2.3.x.

bug #1215432