Cannot save keys due to Autogenerated newline on save

[MauritzKurt]

Solution reference:
microsoft/vscode#12076

[heratyian]

should set default settings.json to "files.insertFinalNewline": false. This affects saving rails credentials master.key

[heratyian]

something like this might work in .vscode/settings.json

{
  "[key]": {
      "files.insertFinalNewline": false,
    },
    "files.associations": {
      "*.key": "key"
    }
}