Normalized a few cases of whitespace in function declarations.

Found them using::

  find . -name '*.py' | while read i ; do grep 'def[^(]*( ' $i /dev/null ; done
  find . -name '*.py' | while read i ; do grep ' ):' $i /dev/null ; done

(I was doing this all over my own code anyway, because I'd been using spaces in
all defs, so I thought I'd make a run on the Python code as well.  If you need
to do such fixes in your own code, you can use xx-rename or parenregu.el within
emacs.)
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index ed28153..dcc565a 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -362,7 +362,7 @@
             _cells = {}
             def __setitem__(self, key, formula):
                 self._cells[key] = formula
-            def __getitem__(self, key ):
+            def __getitem__(self, key):
                 return eval(self._cells[key], globals(), self)
 
         ss = SpreadSheet()