minor #14121 CS: Pre incrementation/decrementation should be used if possible (gharlan)

This PR was merged into the 2.3 branch.

Discussion
----------

CS: Pre incrementation/decrementation should be used if possible

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

Fixes provided by new fixer: PHP-CS-Fixer/PHP-CS-Fixer#1113

If this pr is merged I would change the level of the fixer to `symfony`.

Commits
-------

c5123d6 CS: Pre incrementation/decrementation should be used if possible

Author: fabpot

Loader/MoFileLoader.php

@@ -116,7 +116,7 @@ private function parse($resource)
 
         $messages = array();
 
-        for ($i = 0; $i < $count; $i++) {
+        for ($i = 0; $i < $count; ++$i) {
             $singularId = $pluralId = null;
             $translated = null;
 

Tests/PluralizationRulesTest.php

@@ -112,7 +112,7 @@ protected function generateTestData($plural, $langCodes)
     {
         $matrix = array();
         foreach ($langCodes as $langCode) {
-            for ($count = 0; $count < 200; $count++) {
+            for ($count = 0; $count < 200; ++$count) {
                 $plural = PluralizationRules::get($count, $langCode);
                 $matrix[$langCode][$count] = $plural;
             }