/usr/share/gocode/src/github.com/dgrijalva/jwt-go/test/ec256-public.pem is in golang-github-dgrijalva-jwt-go-dev 3.0.0.1+REALLY.2.6.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | -----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEYD54V/vp+54P9DXarYqx4MPcm+HK
RIQzNasYSoRQHQ/6S6Ps8tpMcT+KvIIC8W/e9k0W7Cm72M1P9jU7SLf/vg==
-----END PUBLIC KEY-----
|