Merge branch '4.0' into 4.1

* 4.0:
  [Filesystem] fix lock file permissions
  [Lock] fix lock file permissions
  [Form] Removed .form-control-label class.
  Removed .mb-0 in errors.
  Fix the detection of the Process new argument
  add @xabbuh as a code owner of the Yaml component
  improve deprecation messages
  Replace .initialism with .text-uppercase.

Author: nicolas-grekas

Resources/views/Form/bootstrap_4_layout.html.twig

@@ -189,7 +189,7 @@
         {% elseif type is defined and type == 'file' %}
             {%- set label_attr = label_attr|merge({for: id, class: (label_attr.class|default('') ~ ' custom-file-label')|trim}) -%}
         {%- else -%}
-            {%- set label_attr = label_attr|merge({for: id, class: (label_attr.class|default('') ~ ' form-control-label')|trim}) -%}
+            {%- set label_attr = label_attr|merge({for: id}) -%}
         {%- endif -%}
         {% if required -%}
             {% set label_attr = label_attr|merge({class: (label_attr.class|default('') ~ ' required')|trim}) %}
@@ -284,8 +284,8 @@
     {%- if errors|length > 0 -%}
         <span class="{% if form is not rootform %}invalid-feedback{% else %}alert alert-danger{% endif %} d-block">
             {%- for error in errors -%}
-                <span class="mb-0 d-block">
-                    <span class="initialism form-error-icon badge badge-danger">{{ 'Error'|trans({}, 'validators') }}</span> <span class="form-error-message">{{ error.message }}</span>
+                <span class="d-block">
+                    <span class="form-error-icon badge badge-danger text-uppercase">{{ 'Error'|trans({}, 'validators') }}</span> <span class="form-error-message">{{ error.message }}</span>
                 </span>
             {%- endfor -%}
         </span>

composer.json

@@ -23,7 +23,7 @@
         "symfony/asset": "~3.4|~4.0",
         "symfony/dependency-injection": "~3.4|~4.0",
         "symfony/finder": "~3.4|~4.0",
-        "symfony/form": "^4.1",
+        "symfony/form": "^4.1.2",
         "symfony/http-foundation": "~3.4|~4.0",
         "symfony/http-kernel": "~3.4|~4.0",
         "symfony/polyfill-intl-icu": "~1.0",
@@ -41,7 +41,7 @@
         "symfony/workflow": "~3.4|~4.0"
     },
     "conflict": {
-        "symfony/form": "<4.1",
+        "symfony/form": "<4.1.2",
         "symfony/console": "<3.4"
     },
     "suggest": {