#3317 NORM Untriag: Fix NameError's in shell/shellservice.py

[Zarro Boogs per Child]

#3317: Fix NameError's in shell/shellservice.py
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 Reporter:  mstone   |       Owner:  dcbw     
     Type:  defect   |      Status:  new      
 Priority:  normal   |   Milestone:  Untriaged
Component:  sugar    |     Version:           
 Keywords:  review?  |    Verified:  0        
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 The Sugar Shell has a few bugs from typos on an infrequently-exercised
 code-path that were failing silently.

 The attached patch fixes the problem.

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Ticket URL: <https://dev.laptop.org/ticket/3317>
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