bug #13806 [TwigBridge] Bootstrap Layout - Fix the label of checkbox …

…cannot be empty (ogizanagi)

This PR was merged into the 2.6 branch.

Discussion
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[TwigBridge] Bootstrap Layout - Fix the label of checkbox cannot be empty

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #13803
| License       | MIT

Commits
-------

9689639 [TwigBridge] Bootstrap Layout - Fix the label of checkbox cannot be empty

src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_3_layout.html.twig

@@ -164,12 +164,12 @@
         {% if parent_label_class is defined %}
             {% set label_attr = label_attr|merge({class: (label_attr.class|default('') ~ ' ' ~ parent_label_class)|trim}) %}
         {% endif %}
-        {% if label is empty %}
+        {% if label is not sameas(false) and label is empty %}
             {% set label = name|humanize %}
         {% endif %}
         <label{% for attrname, attrvalue in label_attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}>
                 {{ widget|raw }}
-                {{ label|trans({}, translation_domain) }}
+                {{ label is not sameas(false) ? label|trans({}, translation_domain) }}
         </label>
     {% endif %}
 {% endblock checkbox_radio_label %}