Add tests and fix major version comment · openconfig/models-ci@ec95d6c

should have a package comment

should have a package comment

package comment should be of the form "Package yangutil ..."

exported function GetAllYANGFiles should have comment or be unexported

should have a package comment

don't use ALL_CAPS in Go names; use CamelCase

package comment should be of the form "Package ocdiff ..."

if block ends with a return statement, so drop this else and outdent its block

exported method DiffReport.Sort should have comment or be unexported

should have a package comment

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