Martisch

quickfix or simple: unnecessary use of io.WriteString with interfaces that support WriteString

2

Pattern Observed: ``` var buf bytes.Buffer io.WriteString(&buf, "...") ``` Can just be ``` var buf bytes.Buffer buf.WriteString("...") ``` with less overhead and shorter written.

simple: check uneeded []byte or []string conversion for len builtin

10

Converting a `string` or `[]byte` to the other type to compute the length is not needed. Example: https://github.com/golang/net/blob/0ba52f642ac2f9371a88bfdde41f4b4e195a37c0/dns/dnsmessage/message.go#L1848