[ET Trac] [Einstein Toolkit] #1824: shellcheck corrections for bash_utils.sh

[Einstein Toolkit]

#1824: shellcheck corrections for bash_utils.sh
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 Reporter:  knarf        |       Owner:                     
     Type:  enhancement  |      Status:  new                
 Priority:  optional     |   Milestone:                     
Component:  Cactus       |     Version:  development version
 Keywords:               |  
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 shellcheck (http://www.shellcheck.net/about.html; thanks Ian) provides a
 way to check for some common mistakes. I've run it on bash_utils.sh and
 corrected what it found. This mostly fixed hypothetical problems with
 spaces in paths and such (I doubt the rest of the infrastructure would be
 up for that, but that's no reason not to fix it).

 The attached path contains the changes. Thanks for reviewing.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1824>
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