rlp: fix some golint warnings (#16659)

rlp/encode.go

@@ -92,7 +92,7 @@ func Encode(w io.Writer, val interface{}) error {
 	return eb.toWriter(w)
 }
 
-// EncodeBytes returns the RLP encoding of val.
+// EncodeToBytes returns the RLP encoding of val.
 // Please see the documentation of Encode for the encoding rules.
 func EncodeToBytes(val interface{}) ([]byte, error) {
 	eb := encbufPool.Get().(*encbuf)
@@ -104,7 +104,7 @@ func EncodeToBytes(val interface{}) ([]byte, error) {
 	return eb.toBytes(), nil
 }
 
-// EncodeReader returns a reader from which the RLP encoding of val
+// EncodeToReader returns a reader from which the RLP encoding of val
 // can be read. The returned size is the total size of the encoded
 // data.
 //
@@ -151,11 +151,10 @@ func puthead(buf []byte, smalltag, largetag byte, size uint64) int {
 	if size < 56 {
 		buf[0] = smalltag + byte(size)
 		return 1
-	} else {
-		sizesize := putint(buf[1:], size)
-		buf[0] = largetag + byte(sizesize)
-		return sizesize + 1
 	}
+	sizesize := putint(buf[1:], size)
+	buf[0] = largetag + byte(sizesize)
+	return sizesize + 1
 }
 
 // encbufs are pooled.
@@ -218,7 +217,7 @@ func (w *encbuf) list() *listhead {
 func (w *encbuf) listEnd(lh *listhead) {
 	lh.size = w.size() - lh.offset - lh.size
 	if lh.size < 56 {
-		w.lhsize += 1 // length encoded into kind tag
+		w.lhsize++ // length encoded into kind tag
 	} else {
 		w.lhsize += 1 + intsize(uint64(lh.size))
 	}
@@ -322,10 +321,9 @@ func (r *encReader) next() []byte {
 			p := r.buf.str[r.strpos:head.offset]
 			r.strpos += sizebefore
 			return p
-		} else {
-			r.lhpos++
-			return head.encode(r.buf.sizebuf)
 		}
+		r.lhpos++
+		return head.encode(r.buf.sizebuf)
 
 	case r.strpos < len(r.buf.str):
 		// String data at the end, after all list headers.
@@ -576,9 +574,8 @@ func makePtrWriter(typ reflect.Type) (writer, error) {
 	writer := func(val reflect.Value, w *encbuf) error {
 		if val.IsNil() {
 			return nilfunc(w)
-		} else {
-			return etypeinfo.writer(val.Elem(), w)
 		}
+		return etypeinfo.writer(val.Elem(), w)
 	}
 	return writer, err
 }