Rename wast to wat

tests/compiler/scoped.optimized.wat

@@ -0,0 +1,53 @@
+(module
+ (type $iv (func (param i32)))
+ (type $v (func))
+ (memory $0 1)
+ (export "memory" (memory $0))
+ (start $start)
+ (func $scoped/fn (; 0 ;) (type $iv) (param $0 i32)
+  (nop)
+ )
+ (func $start (; 1 ;) (type $v)
+  (local $0 i32)
+  (loop $continue|0
+   (if
+    (i32.lt_s
+     (get_local $0)
+     (i32.const 1)
+    )
+    (block
+     (set_local $0
+      (i32.add
+       (get_local $0)
+       (i32.const 1)
+      )
+     )
+     (br $continue|0)
+    )
+   )
+  )
+  (set_local $0
+   (i32.const 0)
+  )
+  (loop $continue|1
+   (if
+    (i32.lt_s
+     (get_local $0)
+     (i32.const 1)
+    )
+    (block
+     (set_local $0
+      (i32.add
+       (get_local $0)
+       (i32.const 1)
+      )
+     )
+     (br $continue|1)
+    )
+   )
+  )
+  (call $scoped/fn
+   (i32.const 42)
+  )
+ )
+)