Apply fixes from StyleCI

Author: yajra

src/Exports/DataTablesCollectionExport.php

@@ -7,7 +7,7 @@
 use Maatwebsite\Excel\Concerns\FromCollection;
 use Maatwebsite\Excel\Concerns\WithHeadings;
 
-abstract class DataTablesCollectionExport implements  FromCollection, WithHeadings
+abstract class DataTablesCollectionExport implements FromCollection, WithHeadings
 {
     use Exportable;
 

src/Services/DataTable.php

@@ -414,7 +414,7 @@ public function excel()
     {
         set_time_limit(3600);
 
-        $ext = '.' . strtolower($this->excelWriter);
+        $ext      = '.' . strtolower($this->excelWriter);
         $callback = $this->fastExcel ?
             ($this->fastExcelCallback ? $this->fastExcelCallback() : null)
             : $this->excelWriter;
@@ -531,7 +531,7 @@ private function toColumnsCollection(array $columns)
     public function csv()
     {
         set_time_limit(3600);
-        $ext = '.' . strtolower($this->csvWriter);
+        $ext      = '.' . strtolower($this->csvWriter);
         $callback = $this->fastExcel ?
             ($this->fastExcelCallback ? $this->fastExcelCallback() : null)
             : $this->csvWriter;