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Re:What I learned from others' shell scripts by damncabbage on Wednesday August 14, 2013 @04:40AM (#6210480)
The outer quotes aren't required:

  APP_ROOT=`dirname "$0"`
(See http://www.tldp.org/LDP/abs/html/varassignment.html#EX16)

Also, even if ^J or ^M were present in a parent directory's name, the command above would still work. Whitespace-like characters take some getting used to with Bash.

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