merged branch pvolok/fix_7540 (PR #7643)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #7643).

Discussion
----------

[WebProfilerBundle] fixed output of bag values

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7540
| License       | MIT
| Doc PR        | -

Call json_encode with flags: JSON_UNESCAPED_SLASHES and
JSON_UNESCAPED_UNICODE

Commits
-------

7ee8b10 [WebProfilerBundle] fixed output of bag values

src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/bag.html.twig

@@ -7,10 +7,11 @@
     </thead>
     <tbody>
         {% for key in bag.keys|sort %}
-        <tr>
-            <th>{{ key }}</th>
-            <td>{{ bag.get(key)|json_encode }}</td>
-        </tr>
+            <tr>
+                <th>{{ key }}</th>
+                {# JSON_UNESCAPED_SLASHES = 64, JSON_UNESCAPED_UNICODE = 256 #}
+                <td>{{ bag.get(key)|json_encode(64 b-or 256) }}</td>
+            </tr>
         {% endfor %}
     </tbody>
 </table>

src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/table.html.twig

@@ -9,7 +9,8 @@
         {% for key in data|keys|sort %}
             <tr>
                 <th>{{ key }}</th>
-                <td>{{ data[key]|json_encode }}</td>
+                {# JSON_UNESCAPED_SLASHES = 64, JSON_UNESCAPED_UNICODE = 256 #}
+                <td>{{ data[key]|json_encode(64 b-or 256) }}</td>
             </tr>
         {% endfor %}
     </tbody>