Php-cs-fixer Command Change

PR #3852 was a bit strange. Php-cs-fixer complained about a problem that I could not reproduce on my local system, and it didn't really produce sufficient output to correct whatever the problem was. I was able to guess it eventually, but I need to see if there's a way to get it to be more forthcoming.

.github/workflows/main.yml

@@ -112,7 +112,7 @@ jobs:
         run: composer install --no-progress --prefer-dist --optimize-autoloader
 
       - name: Code style with PHP-CS-Fixer
-        run: ./vendor/bin/php-cs-fixer fix --format=checkstyle | cs2pr
+        run: ./vendor/bin/php-cs-fixer fix --format=checkstyle --diff --dry-run | cs2pr
 
   phpcs:
     runs-on: ubuntu-latest

src/PhpSpreadsheet/CellReferenceHelper.php

@@ -24,7 +24,7 @@ class CellReferenceHelper
         $this->numberOfRows = $numberOfRows;
 
         // Get coordinate of $beforeCellAddress
-        [$beforeColumn, $beforeRow] = Coordinate::coordinateFromString($beforeCellAddress);
+        [$beforeColumn, $beforeRow] = \PhpOffice\PhpSpreadsheet\Cell\Coordinate::coordinateFromString($beforeCellAddress);
         $this->beforeColumn = Coordinate::columnIndexFromString($beforeColumn);
         $this->beforeRow = (int) $beforeRow;
     }