fix new message; whitespace stuff

src/compiler/compile/Component.ts

@@ -1227,7 +1227,7 @@ export default class Component {
 										should_add_as_dependency = false;
 										component.warn(node as any, {
 											code: 'module-script-reactive-declaration',
-											message: `"${name}" is declared in a module variable and will not be reactive`
+											message: `"${name}" is declared in a module script and will not be reactive`
 										});
 									}
 								}

test/runtime/samples/reactive-statement-module-vars/main.svelte

@@ -1,5 +1,5 @@
 <script context="module">
-  let moduleA = 'moduleA';
+	let moduleA = 'moduleA';
 	let moduleB = 'moduleB';
 </script>
 <script>

test/validator/samples/reactive-module-variable/input.svelte

@@ -1,6 +1,6 @@
 <script context="module">
-  let foo;
+	let foo;
 </script>
 <script>
-  $: bar = foo;
+	$: bar = foo;
 </script>

test/validator/samples/reactive-module-variable/warnings.json

@@ -1,16 +1,16 @@
 [
 	{
 		"code": "module-script-reactive-declaration",
-		"message": "\"foo\" is declared in a module variable and will not be reactive",
-		"pos": 67,
+		"message": "\"foo\" is declared in a module script and will not be reactive",
+		"pos": 65,
 		"start": {
-			"character": 67,
-			"column": 11,
+			"character": 65,
+			"column": 10,
 			"line": 5
 		},
 		"end": {
-			"character": 70,
-			"column": 14,
+			"character": 68,
+			"column": 13,
 			"line": 5
 		}
 	}