added comments.

handler.go

@@ -10,6 +10,7 @@ import (
 	"time"
 )
 
+// Stats represents activity status of Go.
 type Stats struct {
 	Time int64 `json:"time"`
 	// runtime
@@ -135,22 +136,27 @@ func GetStats() *Stats {
 var newLineTerm bool = false
 var prettyPrint bool = false
 
+// NewLineTermEnabled enable termination with newline for response body.
 func NewLineTermEnabled() {
 	newLineTerm = true
 }
 
+// NewLineTermDisabled disable termination with newline for response body.
 func NewLineTermDisabled() {
 	newLineTerm = false
 }
 
+// PrettyPrintEnabled enable pretty-print for response body.
 func PrettyPrintEnabled() {
 	prettyPrint = true
 }
 
+// PrettyPrintDisabled disable pritty-print for response body.
 func PrettyPrintDisabled() {
 	prettyPrint = false
 }
 
+// Handler returns activity status of Go.
 func Handler(w http.ResponseWriter, r *http.Request) {
 	var mem runtime.MemStats
 	runtime.ReadMemStats(&mem)