fix: fix some go line issue in go report card

function/function.go

@@ -12,7 +12,7 @@ import (
 // After creates a function that invokes func once it's called n or more times
 func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 	// Catch programming error while constructing the closure
-	MustBeFunction(fn)
+	mustBeFunction(fn)
 	return func(args ...interface{}) []reflect.Value {
 		n--
 		if n < 1 {
@@ -25,7 +25,7 @@ func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 // Before creates a function that invokes func once it's called less than n times
 func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 	// Catch programming error while constructing the closure
-	MustBeFunction(fn)
+	mustBeFunction(fn)
 	var res []reflect.Value
 	return func(args ...interface{}) []reflect.Value {
 		if n > 0 {
@@ -73,7 +73,7 @@ func Delay(delay time.Duration, fn interface{}, args ...interface{}) {
 // Schedule invoke function every duration time, util close the returned bool chan
 func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool {
 	// Catch programming error while constructing the closure
-	MustBeFunction(fn)
+	mustBeFunction(fn)
 	quit := make(chan bool)
 	go func() {
 		for {

function/function_util.go

@@ -31,7 +31,7 @@ func functionValue(function interface{}) reflect.Value {
 	return v
 }
 
-func MustBeFunction(function interface{}) {
+func mustBeFunction(function interface{}) {
 	v := reflect.ValueOf(function)
 	if v.Kind() != reflect.Func {
 		panic(fmt.Sprintf("Invalid function type, value of type %T", function))

function/watcher.go

@@ -25,9 +25,8 @@ func (w *Watcher) Stop() {
 func (w *Watcher) GetElapsedTime() time.Duration {
 	if w.excuting {
 		return time.Duration(time.Now().UnixNano() - w.startTime)
-	} else {
-		return time.Duration(w.stopTime - w.startTime)
 	}
+	return time.Duration(w.stopTime - w.startTime)
 }
 
 // Reset the watch timer.