修复switch...case模板标签嵌套解析错误

library/think/template.php

@@ -495,7 +495,7 @@ class Template
         foreach ($tLib->getTags() as $name => $val) {
             $tags = [$name];
             if (isset($val['alias'])) {
-// 别名设置
+                // 别名设置
                 $tags   = explode(',', $val['alias']);
                 $tags[] = $name;
             }

library/think/template/taglib/cx.php

@@ -33,7 +33,7 @@ class Cx extends Taglib
         'elseif'     => ['attr' => 'condition', 'close' => 0],
         'else'       => ['attr' => '', 'close' => 0],
         'switch'     => ['attr' => 'name', 'level' => 2],
-        'case'       => ['attr' => 'value,break'],
+        'case'       => ['attr' => 'value,break', 'level' => 2],
         'default'    => ['attr' => '', 'close' => 0],
         'compare'    => ['attr' => 'name,value,type', 'level' => 3, 'alias' => 'eq,equal,notequal,neq,gt,lt,egt,elt,heq,nheq'],
         'range'      => ['attr' => 'name,value,type', 'level' => 3, 'alias' => 'in,notin,between,notbetween'],