gistfile1.txt

1. Without the change to line 7 of scripts/rvm:

$ rvm default
$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [i386-darwin9.8.0]
$ sh
sh: /Users/dblack/.rvm/scripts/rvm: line 7: syntax error near unexpected token
`<'
sh: /Users/dblack/.rvm/scripts/rvm: line 7: `\grep -q '^rvm ()' < <( declare -f
) # Is RVM is a shell function?'
sh-3.2$ ruby -v
ruby 1.8.7 (2008-05-31 patchlevel 0) [i686-darwin9.8.0]


2. With the change to line 7:

$ rvm default
$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [i386-darwin9.8.0]
$ sh
sh-3.2$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [i386-darwin9.8.0]


3. And the change is... 

declare -f | grep -q '^rvm ()' # Is RVM a shell function? 

(Erroneous repetition of the word "is" removed for free! :-)