/usr/share/gocode/src/golang.org/x/text/unicode/norm/ is in golang-golang-x-text-dev 0.0~git20170627.0.6353ef0-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/golang.org/x/text/unicode/norm/composition.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/composition_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/example_iter_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/example_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/forminfo.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/forminfo_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/input.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/iter.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/iter_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/maketables.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/norm_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/normalize.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/normalize_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/readwriter.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/readwriter_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/tables.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/transform.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/transform_test.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/trie.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/triegen.go
/usr/share/gocode/src/golang.org/x/text/unicode/norm/ucd_test.go