Amended to source the original aws_zsh_completer.sh rather than the mangled version installed into $(brew-prefix)/bin if using homebrew installed awscli on OSX.
Amended to source the original aws_zsh_completer.sh rather than
the mangled version installed into $(brew-prefix)/bin if using
homebrew installed awscli on OSX.

This was discussed here - https://github.com/Homebrew/homebrew/issues/30268

hbpoison/oh-my-zsh,hbpoison/oh-my-zsh,hbpoison/oh-my-zsh,hbpoison/oh-my-zsh