CS fixes

Author: nicolas-grekas

Store/PdoStore.php

@@ -127,7 +127,7 @@ public function save(Key $key)
 
         try {
             $stmt->execute();
-        } catch (DBALException | Exception $e) {
+        } catch (DBALException|Exception $e) {
             // the lock is already acquired. It could be us. Let's try to put off.
             $this->putOffExpiration($key, $this->initialTtl);
         } catch (\PDOException $e) {