diff --git a/src/pkg/unicode/graphic.go b/src/pkg/unicode/graphic.go
index 5b995fcd0df..ba90b4e5189 100644
--- a/src/pkg/unicode/graphic.go
+++ b/src/pkg/unicode/graphic.go
@@ -39,7 +39,7 @@ func IsGraphic(r rune) bool {
 	if uint32(r) <= MaxLatin1 {
 		return properties[uint8(r)]&pg != 0
 	}
-	return IsOneOf(GraphicRanges, r)
+	return In(r, GraphicRanges...)
 }
 
 // IsPrint reports whether the rune is defined as printable by Go. Such
@@ -51,12 +51,23 @@ func IsPrint(r rune) bool {
 	if uint32(r) <= MaxLatin1 {
 		return properties[uint8(r)]&pp != 0
 	}
-	return IsOneOf(PrintRanges, r)
+	return In(r, PrintRanges...)
 }
 
 // IsOneOf reports whether the rune is a member of one of the ranges.
-func IsOneOf(set []*RangeTable, r rune) bool {
-	for _, inside := range set {
+// The function "In" provides a nicer signature and should be used in preference to IsOneOf.
+func IsOneOf(ranges []*RangeTable, r rune) bool {
+	for _, inside := range ranges {
+		if Is(inside, r) {
+			return true
+		}
+	}
+	return false
+}
+
+// In reports whether the rune is a member of one of the ranges.
+func In(r rune, ranges ...*RangeTable) bool {
+	for _, inside := range ranges {
 		if Is(inside, r) {
 			return true
 		}
diff --git a/src/pkg/unicode/graphic_test.go b/src/pkg/unicode/graphic_test.go
index 7b1f6209e80..c9f289c7f55 100644
--- a/src/pkg/unicode/graphic_test.go
+++ b/src/pkg/unicode/graphic_test.go
@@ -71,7 +71,7 @@ func TestNumberLatin1(t *testing.T) {
 func TestIsPrintLatin1(t *testing.T) {
 	for i := rune(0); i <= MaxLatin1; i++ {
 		got := IsPrint(i)
-		want := IsOneOf(PrintRanges, i)
+		want := In(i, PrintRanges...)
 		if i == ' ' {
 			want = true
 		}
@@ -84,7 +84,7 @@ func TestIsPrintLatin1(t *testing.T) {
 func TestIsGraphicLatin1(t *testing.T) {
 	for i := rune(0); i <= MaxLatin1; i++ {
 		got := IsGraphic(i)
-		want := IsOneOf(GraphicRanges, i)
+		want := In(i, GraphicRanges...)
 		if got != want {
 			t.Errorf("%U incorrect: got %t; want %t", i, got, want)
 		}