Issue #14783: Backport changes from 3.2.
diff --git a/Objects/sliceobject.c b/Objects/sliceobject.c
index d1fe052..767a50a 100644
--- a/Objects/sliceobject.c
+++ b/Objects/sliceobject.c
@@ -211,7 +211,8 @@
 }
 
 PyDoc_STRVAR(slice_doc,
-"slice([start,] stop[, step])\n\
+"slice(stop)\n\
+slice(start, stop[, step])\n\
 \n\
 Create a slice object.  This is used for extended slicing (e.g. a[0:10:2]).");