diff --git a/buffer/buffer.go b/buffer/buffer.go
index 3ad1e5722..a8bc24df4 100644
--- a/buffer/buffer.go
+++ b/buffer/buffer.go
@@ -98,6 +98,7 @@ func (b *Buffer) Write(bs []byte) (int, error) {
 	return len(bs), nil
 }
 
+// TrimNewline trims any final "\n" byte from the end of the buffer.
 func (b *Buffer) TrimNewline() {
 	if i := len(b.bs) - 1; i >= 0 {
 		if b.bs[i] == '\n' {