fixed typo
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 8cb32e1..d37ca0c 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -233,7 +233,7 @@
 {
     register PyUnicodeObject *unicode;
 
-    /* Optimization fo empty strings */
+    /* Optimization for empty strings */
     if (length == 0 && unicode_empty != NULL) {
         Py_INCREF(unicode_empty);
         return unicode_empty;