Backslashes in unquoted values break parsing

[phmarek]

I've got a YAML file whose values include backslashes (filenames for Windows).
This seems to irritate the parsing routine immensely; as long as they're not in double quotes ("), I get errors like

ESRAP-LIQUID parsing failed.
Rule-stack : ()
Position : 142
Text right before : yaml

Specific reason: Didn't make it to the end of the text

where byte 142 is within the first header line comments, and the backslashes are about 1000 bytes later on.
When I put " around the c:\Program Files\mozilla firefox\Firefox path, it works as expected.

I'm not sure what the defined behaviour for YAML is; but either the error message should be improved or parsing such unquoted values should be allowed.

The other libraries didn't complain about that, BTW.

Thanks!