add offers count, & minor fixes code standards

app/Datatables/Botanic/SpeciesDataTable.php

@@ -13,19 +13,17 @@ class SpeciesDataTable extends DataTable
     public function query(Specie $model)
     {
         $model = $model::withCount('varieties')->with('genre');
-        return self::buildQuery($model);
+        return $this->buildQuery($model);
     }
 
     public function modifier($datatables)
     {
         $datatables
-            ->editColumn(
-                'genre_name', function (Specie $specie) {
-                    return $specie->genre ? $specie->genre->name : '';
-                }
-            )
+            ->editColumn('genre_name', function (Specie $specie) {
+                return $specie->genre ? $specie->genre->name : '';
+            })
             ->rawColumns(['genre_name', 'action']);
-        return Parent::modifier($datatables);
+        return parent::modifier($datatables);
     }
 
 
@@ -37,7 +35,7 @@ class SpeciesDataTable extends DataTable
             Column::make('genre.name')->data('genre_name')->title('Genre'),
             Column::make('latin'),
             Column::make('varieties_count')->title('Nb variétés')->searchable(false)->addClass('text-right'),
-            self::makeColumnButtons(),
+            $this->makeColumnButtons(),
         ];
     }
 }