Revert unwanted function name change introduced by r67939.
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 50476ea..3a33429 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -3253,7 +3253,7 @@
     return repr;
 }
 
-PyObject *PyUnicodeAsUnicodeEscapeString(PyObject *unicode)
+PyObject *PyUnicode_AsUnicodeEscapeString(PyObject *unicode)
 {
     PyObject *s;
     if (!PyUnicode_Check(unicode)) {