Strings with values that could be interpreted as scalars should be encoded with quotes

[jgm]

Prelude Data.ByteString Data.Yaml> decode (encode (String "True")) :: Maybe Value
Just (Bool True)

Proposal: String "True" should be encoded with single quotes, as

'True'

rather than

True

And similarly for any string that matches the pattern for Booleans:
y|Y|yes|Yes|YES|n|N|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF.

[snoyberg]

Good call, I've pushed a commit with this change. Can you confirm it addresses your case?

[jgm]

It does, thank you! I'm getting output like this:

    family: !!str 'True'

instead of the nicer and equally good

    family: 'True'

but it's not a big deal if for some reason the !!str is necessary.

[snoyberg]

No reason, I just forgot about the details of how the underlying libyaml works. Should be fixed now.