Corrected theming docs not to give an example of theme view files under webroot

docs/guide/theming.md

@@ -18,7 +18,7 @@ be in your application config file:
 'components' => [
     'view' => [
         'theme' => [
-            'pathMap' => ['@app/views' => '@webroot/themes/basic'],
+            'pathMap' => ['@app/views' => '@app/themes/basic'],
             'baseUrl' => '@web/themes/basic',
         ],
     ],
@@ -26,8 +26,8 @@ be in your application config file:
 ```
 
 In the above `pathMap` defines where to look for view files while `baseUrl` defines base URL for resources referenced
-from these files. For example, if `pathMap` is `['/web/views' => '/web/themes/basic']`,  then the themed version
-for a view file `/web/views/site/index.php` will be `/web/themes/basic/site/index.php`.
+from these files. In our case `pathMap` is `['@app/views' => '@app/themes/basic']` so the themed version
+for a view file `@app/views/site/index.php` will be `@app/themes/basic/site/index.php`.
 
 Using multiple paths
 --------------------
@@ -36,14 +36,14 @@ It is possible to map a single path to multiple paths. For example,
 
 ```php
 'pathMap' => [
-    '/web/views' => [
-        '/web/themes/christmas',
-        '/web/themes/basic',
+    '@app/views' => [
+        '@app/themes/christmas',
+        '@app/themes/basic',
     ],
 ]
 ```
 
-In this case, the view will be searched in `/web/themes/christmas/site/index.php` then if it's not found it will check
-`/web/themes/basic/site/index.php`. If there's no view there as well application view will be used.
+In this case, the view will be searched in `@app/themes/christmas/site/index.php` then if it's not found it will check
+`@app/themes/basic/site/index.php`. If there's no view there as well application view will be used.
 
 This ability is especially useful if you want to temporary or conditionally override some views.

framework/base/Theme.php

@@ -27,23 +27,23 @@ use yii\helpers\FileHelper;
  *    to replace the original view file.
  * 4. If Step 2 or 3 fails, the original view file will be used.
  *
- * For example, if [[pathMap]] is `['/web/views' => '/web/themes/basic']`,
- * then the themed version for a view file `/web/views/site/index.php` will be
- * `/web/themes/basic/site/index.php`.
+ * For example, if [[pathMap]] is `['@app/views' => '@app/themes/basic']`,
+ * then the themed version for a view file `@app/views/site/index.php` will be
+ * `@app/themes/basic/site/index.php`.
  *
  * It is possible to map a single path to multiple paths. For example,
  *
  * ~~~
  * 'pathMap' => [
- *     '/web/views' => [
- *         '/web/themes/christmas',
- *         '/web/themes/basic',
+ *     '@app/views' => [
+ *         '@app/themes/christmas',
+ *         '@app/themes/basic',
  *     ],
  * ]
  * ~~~
  *
- * In this case, the themed version could be either `/web/themes/christmas/site/index.php` or
- * `/web/themes/basic/site/index.php`. The former has precedence over the latter if both files exist.
+ * In this case, the themed version could be either `@app/themes/christmas/site/index.php` or
+ * `@app/themes/basic/site/index.php`. The former has precedence over the latter if both files exist.
  *
  * To use a theme, you should configure the [[View::theme|theme]] property of the "view" application
  * component like the following:
@@ -51,7 +51,7 @@ use yii\helpers\FileHelper;
  * ~~~
  * 'view' => [
  *     'theme' => [
- *         'basePath' => '@webroot/themes/basic',
+ *         'basePath' => '@app/themes/basic',
  *         'baseUrl' => '@web/themes/basic',
  *     ],
  * ],