Merge branch '6.4' into 7.2

* 6.4:
  -
  CS fixes

Author: nicolas-grekas

Dumper/PoFileDumper.php

@@ -100,7 +100,7 @@ private function getStandardRules(string $id): array
             if (preg_match($intervalRegexp, $part)) {
                 // Explicit rule is not a standard rule.
                 return [];
-            }  
+            }
 
             $standardRules[] = $part;
         }