-- want --
valid:
valid.go
go.mod
pkg/vendor/vendor.go

omitted:
vendor/x/y: file is in vendor directory
vendor/modules.txt: file is in vendor directory
sub/go.mod: file is in another module
.hg_archival.txt: file is inserted by 'hg archive' and is always omitted

invalid:
not/../clean: file path is not clean
invalid.go': malformed file path "invalid.go'": invalid char '\''
valid.go: multiple entries for file "valid.go"
-- valid.go --
-- not/../clean --
-- go.mod --
go 1.24
-- invalid.go' --
-- vendor/x/y --
-- vendor/modules.txt --
-- sub/go.mod --
go 1.23
-- .hg_archival.txt --
-- valid.go --
duplicate
-- valid.go --
another duplicate
-- pkg/vendor/vendor.go --