fix const test

Author: manuel3108

packages/svelte/src/compiler/print/index.js

@@ -442,8 +442,7 @@ const svelte_visitors = {
 	},
 
 	ConstTag(node, context) {
-		// TODO this is buggy
-		context.write('{@const ');
+		context.write('{@');
 		context.visit(node.declaration);
 		context.write('}');
 	},

packages/svelte/tests/print/samples/const/input.svelte renamed to packages/svelte/tests/print/samples/const-tag/input.svelte

@@ -3,6 +3,6 @@
 </script>
 
 {#each boxes as box}
-	{@const const area = box.width * box.height;}
+	{@const area = box.width * box.height;}
 	{box.width} * {box.height} = {area}
 {/each}