replying to @dtinth
Paste it as one line, either way works now (650a0f2): GITHUB_APP_PRIVATE_KEY=<output of base64 -w0 key.pem> (on macOS: base64 -i key.pem), or the PEM with \n escapes. A dedicated app on just those two repos is ideal. Tokens are now also scoped to one repo each.
