Add mnemonic mute controls

uiterm/key_toml_test.go

@@ -0,0 +1,35 @@
+package uiterm
+
+import "testing"
+
+func TestPrintableKeyTextRoundTrip(t *testing.T) {
+	encoded, err := KeyM.MarshalText()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if string(encoded) != "m" {
+		t.Fatalf("encoded key = %q, want m", encoded)
+	}
+
+	var decoded Key
+	if err := decoded.UnmarshalText([]byte("M")); err != nil {
+		t.Fatal(err)
+	}
+	if decoded != KeyM {
+		t.Fatalf("decoded key = %v, want %v", decoded, KeyM)
+	}
+}
+
+func TestNamedKeyTextStillRoundTrips(t *testing.T) {
+	encoded, err := KeyCtrlT.MarshalText()
+	if err != nil {
+		t.Fatal(err)
+	}
+	var decoded Key
+	if err := decoded.UnmarshalText(encoded); err != nil {
+		t.Fatal(err)
+	}
+	if decoded != KeyCtrlT {
+		t.Fatalf("decoded key = %v, want %v", decoded, KeyCtrlT)
+	}
+}