Update WriteErrors error message (#964)
Update WriteErrors error message (#964)

* Update WriteErrors error message

* Update error.go

* Handle error nil case

* Update error message for write errors

* preallocate the errors slice

Co-authored-by: Achille <13d753f712dc38d2402040b5c500f6e50988915c@segment.com>
segmentio/kafka-go