Fix index() signature

Author: AA-Turner

Doc/library/stdtypes.rst

@@ -1040,13 +1040,13 @@ operations have the same priority as the corresponding numeric operations. [3]_
 
    Return the total number of occurrences of *value* in *sequence*.
 
-.. method:: list.index(value, start=0, stop=None, /)
-            range.index(value, start=0, stop=None, /)
-            tuple.index(value, start=0, stop=None, /)
+.. method:: list.index(value[, start[, stop])
+            range.index(value[, start[, stop])
+            tuple.index(value[, start[, stop])
    :no-contents-entry:
    :no-index-entry:
    :no-typesetting:
-.. method:: sequence.index(value, start=0, stop=None, /)
+.. method:: sequence.index(value[, start[, stop])
 
    Return the index of the first occurrence of *value* in *sequence*.