bpo-20047: Make bytearray methods partition() and rpartition() rejecting (#4158)

separators that are not bytes-like objects.
diff --git a/Objects/clinic/bytesobject.c.h b/Objects/clinic/bytesobject.c.h
index 315f6f2..9c358b5 100644
--- a/Objects/clinic/bytesobject.c.h
+++ b/Objects/clinic/bytesobject.c.h
@@ -86,7 +86,7 @@
 "\n"
 "Partition the bytes into three parts using the given separator.\n"
 "\n"
-"This will search for the separator sep in the bytes, starting and the end. If\n"
+"This will search for the separator sep in the bytes, starting at the end. If\n"
 "the separator is found, returns a 3-tuple containing the part before the\n"
 "separator, the separator itself, and the part after it.\n"
 "\n"
@@ -499,4 +499,4 @@
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=9e3374bd7d04c163 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=fc9e02359cc56d36 input=a9049054013a1b77]*/