RDF exports use .nt extension, but are turtle (ie. .ttl)

[andrawaag]

Some rdf exports use the .nt extension, while the results are turtle. Python scripts that infer the format by the extension will not parse this rdf while being valid.

[joshmoore]

The exports themselves don't currently use an extension at all. It just goes to stdout. (But, yes, the files I gave you were incorrect 😄) I take this issue to mean, "to prevent human error, have the plugin create a file with the correct file-ending"