/usr/share/gocode/src/github.com/naoina/toml/testdata/unmarshal-string-1.toml is in golang-github-naoina-toml-dev 0.1.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | # unmarshal-string-1.toml
key1 = "One\nTwo"
key2 = """One\nTwo"""
key3 = """
One
Two"""
|