rename heap_lang/heap_lang -> heap_lang/lang

_CoqProject

@@ -71,7 +71,7 @@ program_logic/saved_prop.v
 program_logic/auth.v
 program_logic/sts.v
 program_logic/namespaces.v
-heap_lang/heap_lang.v
+heap_lang/lang.v
 heap_lang/tactics.v
 heap_lang/wp_tactics.v
 heap_lang/lifting.v

heap_lang/lifting.v

 From program_logic Require Export weakestpre.
-From heap_lang Require Export heap_lang.
+From heap_lang Require Export lang.
 From program_logic Require Import lifting.
 From program_logic Require Import ownership. (* for ownP *)
 From heap_lang Require Import tactics.

heap_lang/tactics.v

-From heap_lang Require Export heap_lang.
+From heap_lang Require Export lang.
 From prelude Require Import fin_maps.
 Import heap_lang.