Chainspec parsing fails

[lovelaced]

Due to the change in format of output when starting a node (see https://github.com/paritytech/substrate/blob/master/client/network/src/service.rs#L195 ) the parsing + injection of the node_key ends up with a stray ) on the end which breaks the chainspec JSON, and installation fails.

 "stderr_lines": ["Error: Input(\"Error parsing spec file: failed to parse: provided string contained invalid character \\')\\' at byte 46 at line 1 column 170\")"], "stdout": "", "stdout_lines": []}

[rozifus]

Big thanks for catching this and identifying the issue!

I'll see about getting this fixed