scratch buffer opening with a " in the command line

I am trying to modify this script:
https://github.com/fncll/wordnet.vim/blob/master/plugin/wordnet.vim

so that I can press `q` to quit.

However, when the scratch buffer opens with the results, there is a
double-quotation mark in the command line that I have to `ESC` out of
before I can do anything. I have no idea what that " means or where it
is coming from.

So, where is it coming from and how can I stop it?

c
--
Chris Lott <chris@chrislott.org>

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