`intlc prettify` isn't working

[Oliver Joseph Ash]

I’m trying to use intlc prettify for the first time. I’m copying the example in the PR #173. I get this error:

$ pbpaste > x.json

$ intlc prettify $(cat x.json | jq -r .x.message)
Invalid argument `boolean,'

Usage: intlc COMMAND
  Compile ICU messages into code.

[Oliver Joseph Ash]

I was missing quotes:

intlc prettify "$(cat x.json | jq -r .x.message)"