diff -r cec4d5e4f251 Objects/bytearrayobject.c
--- a/Objects/bytearrayobject.c	Mon Mar 14 20:49:14 2011 +0100
+++ b/Objects/bytearrayobject.c	Mon Mar 14 21:08:30 2011 +0100
@@ -2245,7 +2245,7 @@
     if (it == NULL)
         return NULL;
 
-    /* Try to determine the length of the argument. 32 is abitrary. */
+    /* Try to determine the length of the argument. 32 is arbitrary. */
     buf_size = _PyObject_LengthHint(arg, 32);
     if (buf_size == -1) {
         Py_DECREF(it);