Blocked revisions 88402-88403 via svnmerge

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  r88402 | r.david.murray | 2011-02-11 17:37:16 -0500 (Fri, 11 Feb 2011) | 2 lines

  Fix argument name typo in compileall docs.
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  r88403 | r.david.murray | 2011-02-11 17:47:17 -0500 (Fri, 11 Feb 2011) | 3 lines

  #11116: roll back on error during add so mailbox isn't left corrupted.
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