remove_duplicate_values_for_repeated_fields.OUT.textproto

# txtpbfmt: sort_fields_by_field_name
# txtpbfmt: sort_repeated_fields_by_content
# txtpbfmt: remove_duplicate_values_for_repeated_fields
head {
  a: 1
  a: 3
  a: 4
  a: 5
  b: 5
}