Convert a bunch of constant strings in C to unicode.
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 1ae38d5..a483b6c 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -194,7 +194,7 @@
 {
 	register dictobject *mp;
 	if (dummy == NULL) { /* Auto-initialize dummy */
-		dummy = PyString_FromString("<dummy key>");
+		dummy = PyUnicode_FromString("<dummy key>");
 		if (dummy == NULL)
 			return NULL;
 #ifdef SHOW_CONVERSION_COUNTS
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 7e2483e..50d9d9b 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -142,7 +142,7 @@
 	}
 	if (i < 0 || i >= Py_Size(op)) {
 		if (indexerr == NULL)
-			indexerr = PyString_FromString(
+			indexerr = PyUnicode_FromString(
 				"list index out of range");
 		PyErr_SetObject(PyExc_IndexError, indexerr);
 		return NULL;
@@ -362,7 +362,7 @@
 {
 	if (i < 0 || i >= Py_Size(a)) {
 		if (indexerr == NULL)
-			indexerr = PyString_FromString(
+			indexerr = PyUnicode_FromString(
 				"list index out of range");
 		PyErr_SetObject(PyExc_IndexError, indexerr);
 		return NULL;
diff --git a/Objects/setobject.c b/Objects/setobject.c
index 2cc1743..7ff27b1 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -966,7 +966,7 @@
 	register PySetObject *so = NULL;
 
 	if (dummy == NULL) { /* Auto-initialize dummy */
-		dummy = PyString_FromString("<dummy key>");
+		dummy = PyUnicode_FromString("<dummy key>");
 		if (dummy == NULL)
 			return NULL;
 	}