Merge branch '5.2' into 5.3

* 5.2:
  Add missing validators translation
  Improve usage of twig ternary
  skip test

Author: fabpot

Tests/Helper/QuestionHelperTest.php

@@ -879,6 +879,10 @@ public function testDisableStty()
 
     public function testTraversableMultiselectAutocomplete()
     {
+        if (!Terminal::hasSttyAvailable()) {
+            $this->markTestSkipped('`stty` is required to test autocomplete functionality');
+        }
+
         // <NEWLINE>
         // F<TAB><NEWLINE>
         // A<3x UP ARROW><TAB>,F<TAB><NEWLINE>