retrun a new instance of Time from In()

ptime.go

@@ -573,13 +573,14 @@ func (t *Time) SetNanosecond(nsec int) {
 // In sets the location of t.
 //
 // loc is a pointer to time.Location and must not be nil.
-func (t *Time) In(loc *time.Location) {
+func (t Time) In(loc *time.Location) Time {
 	if loc == nil {
 		panic("ptime: the Location must not be nil in call to In")
 	}
 
 	t.loc = loc
 	t.resetWeekday()
+	return t
 }
 
 // At sets the hour, min minute, sec second and nsec nanoseconds offsets of t.

ptime_test.go

@@ -214,6 +214,17 @@ func TestLocations(t *testing.T) {
 			"got", Afghanistan().String(),
 		)
 	}
+
+	loc, _ := time.LoadLocation("Asia/Baghdad")
+	expected := loc.String()
+	actual := Now().In(loc).Location().String()
+	if actual != expected {
+		t.Error(
+			"For", "Baghdad",
+			"expected", expected,
+			"got", actual,
+		)
+	}
 }
 
 func TestPersianToGregorian(t *testing.T) {