fix: Convert multi-line translation string to single

frappe/core/doctype/data_import/importer.py

@@ -929,10 +929,7 @@ class Column:
 				self.warnings.append(
 					{
 						"col": self.column_number,
-						"message": _(
-							"Date format could not be determined from the values in"
-							" this column. Defaulting to yyyy-mm-dd."
-						),
+						"message": _("Date format could not be determined from the values in this column. Defaulting to yyyy-mm-dd."),
 						"type": "info",
 					}
 				)