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

Expression/Glob.php

@@ -105,7 +105,7 @@ public function toRegex($strictLeadingDot = true, $strictWildcardSlash = true)
         $inCurlies = 0;
         $regex = '';
         $sizeGlob = strlen($this->pattern);
-        for ($i = 0; $i < $sizeGlob; $i++) {
+        for ($i = 0; $i < $sizeGlob; ++$i) {
             $car = $this->pattern[$i];
             if ($firstByte) {
                 if ($strictLeadingDot && '.' !== $car) {

Glob.php

@@ -51,7 +51,7 @@ public static function toRegex($glob, $strictLeadingDot = true, $strictWildcardS
         $inCurlies = 0;
         $regex = '';
         $sizeGlob = strlen($glob);
-        for ($i = 0; $i < $sizeGlob; $i++) {
+        for ($i = 0; $i < $sizeGlob; ++$i) {
             $car = $glob[$i];
             if ($firstByte) {
                 if ($strictLeadingDot && '.' !== $car) {

Tests/FinderTest.php

@@ -464,7 +464,7 @@ public function testCountDirectories()
         $i = 0;
 
         foreach ($directory as $dir) {
-            $i++;
+            ++$i;
         }
 
         $this->assertCount($i, $directory);
@@ -476,7 +476,7 @@ public function testCountFiles()
         $i = 0;
 
         foreach ($files as $file) {
-            $i++;
+            ++$i;
         }
 
         $this->assertCount($i, $files);

Tests/Iterator/FilterIteratorTest.php

@@ -31,7 +31,7 @@ public function testFilterFilesystemIterators()
 
         $c = 0;
         foreach ($i as $item) {
-            $c++;
+            ++$c;
         }
 
         $this->assertEquals(1, $c);
@@ -40,7 +40,7 @@ public function testFilterFilesystemIterators()
 
         $c = 0;
         foreach ($i as $item) {
-            $c++;
+            ++$c;
         }
 
         // This would fail with \FilterIterator but works with Symfony\Component\Finder\Iterator\FilterIterator