More consistent file names for coPset, bset and set.

Similar files (gmap, listset, ...) were already in singular form and
matched the name of the set/map data type.

_CoqProject

 -Q . iris
 prelude/option.v
 prelude/fin_map_dom.v
-prelude/bsets.v
+prelude/bset.v
 prelude/fin_maps.v
 prelude/vector.v
 prelude/pmap.v
@@ -28,9 +28,9 @@ prelude/finite.v
 prelude/numbers.v
 prelude/nmap.v
 prelude/zmap.v
-prelude/co_pset.v
+prelude/coPset.v
 prelude/lexico.v
-prelude/sets.v
+prelude/set.v
 prelude/decidable.v
 prelude/list.v
 prelude/error.v

algebra/sts.v

-From iris.prelude Require Export sets.
+From iris.prelude Require Export set.
 From iris.algebra Require Export cmra.
 From iris.algebra Require Import dra.
 Local Arguments valid _ _ !_ /.

prelude/gmap.v

@@ -3,7 +3,7 @@
 (** This file implements finite maps and finite sets with keys of any countable
 type. The implementation is based on [Pmap]s, radix-2 search trees. *)
 From iris.prelude Require Export countable fin_maps fin_map_dom.
-From iris.prelude Require Import pmap mapset sets.
+From iris.prelude Require Import pmap mapset set.
 
 (** * The data structure *)
 (** We pack a [Pmap] together with a proof that ensures that all keys correspond

program_logic/namespaces.v

-From iris.prelude Require Export countable co_pset.
+From iris.prelude Require Export countable coPset.
 From iris.algebra Require Export base.
 
 Definition namespace := list positive.

program_logic/pviewshifts.v

-From iris.prelude Require Export co_pset.
+From iris.prelude Require Export coPset.
 From iris.algebra Require Export upred_big_op.
 From iris.program_logic Require Export model.
 From iris.program_logic Require Import ownership wsat.

program_logic/wsat.v

-From iris.prelude Require Export co_pset.
+From iris.prelude Require Export coPset.
 From iris.program_logic Require Export model.
 From iris.algebra Require Export cmra_big_op cmra_tactics.
 Local Hint Extern 10 (_ ≤ _) => omega.