More trivial comment -> docstring transformations by Ka-Ping Yee,
who writes:

Here is batch 2, as a big collection of CVS context diffs.
Along with moving comments into docstrings, i've added a
couple of missing docstrings and attempted to make sure more
module docstrings begin with a one-line summary.

I did not add docstrings to the methods in profile.py for
fear of upsetting any careful optimizations there, though
i did move class documentation into class docstrings.

The convention i'm using is to leave credits/version/copyright
type of stuff in # comments, and move the rest of the descriptive
stuff about module usage into module docstrings.  Hope this is
okay.
diff --git a/Lib/os.py b/Lib/os.py
index 057c101..129d4b2 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -1,21 +1,22 @@
-# os.py -- either mac, dos or posix depending on what system we're on.
+"""os.py -- either mac, dos or posix depending on what system we're on.
 
-# This exports:
-# - all functions from either posix or mac, e.g., os.unlink, os.stat, etc.
-# - os.path is either module posixpath or macpath
-# - os.name is either 'posix' or 'mac'
-# - os.curdir is a string representing the current directory ('.' or ':')
-# - os.pardir is a string representing the parent directory ('..' or '::')
-# - os.sep is the (or a most common) pathname separator ('/' or ':' or '\\')
-# - os.altsep is the alternatte pathname separator (None or '/')
-# - os.pathsep is the component separator used in $PATH etc
-# - os.defpath is the default search path for executables
+This exports:
+  - all functions from either posix or mac, e.g., os.unlink, os.stat, etc.
+  - os.path is either module posixpath or macpath
+  - os.name is either 'posix' or 'mac'
+  - os.curdir is a string representing the current directory ('.' or ':')
+  - os.pardir is a string representing the parent directory ('..' or '::')
+  - os.sep is the (or a most common) pathname separator ('/' or ':' or '\\')
+  - os.altsep is the alternatte pathname separator (None or '/')
+  - os.pathsep is the component separator used in $PATH etc
+  - os.defpath is the default search path for executables
 
-# Programs that import and use 'os' stand a better chance of being
-# portable between different platforms.  Of course, they must then
-# only use functions that are defined by all platforms (e.g., unlink
-# and opendir), and leave all pathname manipulation to os.path
-# (e.g., split and join).
+Programs that import and use 'os' stand a better chance of being
+portable between different platforms.  Of course, they must then
+only use functions that are defined by all platforms (e.g., unlink
+and opendir), and leave all pathname manipulation to os.path
+(e.g., split and join).
+"""
 
 import sys