Convert all "i" docs to new style optional args.
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index fa4484d..e6a9fe2 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -1,4 +1,3 @@
-
:mod:`itertools` --- Functions creating iterators for efficient looping
=======================================================================
@@ -291,7 +290,7 @@
yield x
-.. function:: groupby(iterable[, key])
+.. function:: groupby(iterable, key=None)
Make an iterator that returns consecutive keys and groups from the *iterable*.
The *key* is a function computing a key value for each element. If not
@@ -372,7 +371,7 @@
then the step defaults to one.
-.. function:: permutations(iterable[, r])
+.. function:: permutations(iterable, r=None)
Return successive *r* length permutations of elements in the *iterable*.
@@ -430,7 +429,7 @@
The number of items returned is ``n! / (n-r)!`` when ``0 <= r <= n``
or zero when ``r > n``.
-.. function:: product(*iterables[, repeat])
+.. function:: product(*iterables, repeat=1)
Cartesian product of input iterables.
@@ -460,7 +459,7 @@
yield tuple(prod)
-.. function:: repeat(object[, times])
+.. function:: repeat(object, times=-1)
Make an iterator that returns *object* over and over again. Runs indefinitely
unless the *times* argument is specified. Used as argument to :func:`map` for
@@ -505,7 +504,7 @@
break
-.. function:: tee(iterable[, n=2])
+.. function:: tee(iterable, n=2)
Return *n* independent iterators from a single iterable. Equivalent to::
@@ -531,7 +530,7 @@
:func:`list` instead of :func:`tee`.
-.. function:: zip_longest(*iterables[, fillvalue])
+.. function:: zip_longest(*iterables, fillvalue=None)
Make an iterator that aggregates elements from each of the iterables. If the
iterables are of uneven length, missing values are filled-in with *fillvalue*.