minor #1550 [CS] Minor CS fixes (smnandre)

This PR was squashed before being merged into the 2.x branch.

Discussion
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[CS] Minor CS fixes

Commits
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3378c06 [CS] Minor CS fixes

Author: weaverryan

src/LiveComponent/src/Twig/TemplateCacheWarmer.php

@@ -36,7 +36,7 @@ public function warmUp(string $cacheDir, ?string $buildDir = null): array
             $map[hash('xxh128', $item.$this->secret)] = $item;
         }
 
-        $cacheFile = sprintf('%s%s%s', $buildDir ?? $cacheDir, DIRECTORY_SEPARATOR, $this->cacheFilename);
+        $cacheFile = sprintf('%s%s%s', $buildDir ?? $cacheDir, \DIRECTORY_SEPARATOR, $this->cacheFilename);
         PhpArrayAdapter::create($cacheFile, new NullAdapter())->warmUp(['map' => $map]);
 
         return [];

ux.symfony.com/src/LiveMemory/Asset/CssCompiler.php

@@ -17,7 +17,7 @@
 use Symfony\Component\Filesystem\Path;
 
 /**
- * Experimental CSS compiler
+ * Experimental CSS compiler.
  *
  * This compiler combines all the SCSS files imported in `live-memory.min.css`
  * into a single CSS file, and removes SASS comments and empty lines.
@@ -34,7 +34,6 @@ public function supports(MappedAsset $asset): bool
     public function compile(string $content, MappedAsset $asset, AssetMapperInterface $assetMapper): string
     {
         return preg_replace_callback('#@import (?:"|\')(.*)(?:\'|");#m', function ($matches) use ($asset) {
-
             $file = $matches[1];
             $file = substr_replace($file, '/_', strrpos($file, '/'), 1);
             $file = './'.$file.'.scss';