bug #16578 [Console] Fix bug in windows detection (kbond)

This PR was submitted for the 2.8 branch but it was merged into the 2.7 branch instead (closes #16578).

Discussion
----------

[Console] Fix bug in windows detection

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #16577
| License       | MIT
| Doc PR        | n/a

Commits
-------

c4068d9 Fix bug in windows detection

src/Symfony/Component/Console/Style/SymfonyStyle.php

@@ -294,7 +294,7 @@ public function createProgressBar($max = 0)
     {
         $progressBar = parent::createProgressBar($max);
 
-        if ('\\' === DIRECTORY_SEPARATOR) {
+        if ('\\' !== DIRECTORY_SEPARATOR) {
             $progressBar->setEmptyBarCharacter('░'); // light shade character \u2591
             $progressBar->setProgressCharacter('');
             $progressBar->setBarCharacter('▓'); // dark shade character \u2593