Merged revisions 73026,73313,73511,73554 via svnmerge from

Merged revisions 73026,73313,73511,73554 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r73026 | r.david.murray | 2009-05-29 15:30:27 -0400 (Fri, 29 May 2009) | 3 lines

  Issue 6141: document that the first item of args is still the
  command name even when executable is specified.
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  r73313 | r.david.murray | 2009-06-08 20:44:22 -0400 (Mon, 08 Jun 2009) | 4 lines

  Issue 2947: document how return code handling translates from
  os.popen to subprocess.  Also fixes reference link in the
  os.spawn documentation.
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  r73511 | r.david.murray | 2009-06-22 18:11:04 -0400 (Mon, 22 Jun 2009) | 2 lines

  Improve English phrasing.
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  r73554 | r.david.murray | 2009-06-25 10:21:06 -0400 (Thu, 25 Jun 2009) | 2 lines

  Add a couple of missing function alias declarations to the turtle docs.
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