File contents with multiple hyphens break YAML parser

[DavidWittman]

I include some RSA keys in a few of my services, and I have found that they break the YAML parser when trying to use them with Replicated Studio.

Here's an example:

        config_files:
          - filename: /keys/key.pem
            file_mode: '0400'
            contents: |
                -----BEGIN PUBLIC KEY-----
                keystuff
                -----END PUBLIC KEY-----

Causes the following error in the studio container:

Failure parsing YAML file replicated/current.yaml:
YAMLException: end of the stream or a document separator is expected at line 12, column 7:
          - source: dockerhub
          ^

[DavidWittman]

I was able to work around this by supplying the key in a single line instead of a multi-line string, e.g.:

contents: "-----BEGIN PUBLIC KEY-----\nkeystuff\n-----END PUBLIC KEY-----"