If I disable the “rake” plugin of “zsh” in “~/.zshrc” file by modifying the following line:

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# Remove the "rake" item from the following line.
plugins=(git github lein mvn pip pyenv python ruby rake rvm tmux tmuxinator)

I will get the following error:

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$ rake new_post['Test']
zsh: no matches found: new_post[Test]

So the “rake” plugin cannot be removed if you want the rake command works for Octopress under zsh.