fix prettier issues

Author: slax57

packages/ra-ui-materialui/src/list/datagrid/DatagridConfigurable.tsx

@@ -72,13 +72,13 @@ export const DatagridConfigurable = ({
                     child.props.label && typeof child.props.label === 'string' // this list is serializable, so we can't store ReactElement in it
                         ? child.props.label
                         : child.props.source
-                        ? //  force the label to be the source
-                          undefined
-                        : // no source or label, generate a label
-                          translate('ra.configurable.Datagrid.unlabeled', {
-                              column: index,
-                              _: `Unlabeled column #%{column}`,
-                          }),
+                          ? //  force the label to be the source
+                            undefined
+                          : // no source or label, generate a label
+                            translate('ra.configurable.Datagrid.unlabeled', {
+                                column: index,
+                                _: `Unlabeled column #%{column}`,
+                            }),
             }));
         const hasChanged = newAvailableColumns.some(column => {
             const availableColumn = availableColumns.find(