[#203] cli: Fix error message

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

cmd/frostfs-cli/modules/container/delete.go

@@ -77,8 +77,8 @@ Only owner of the container has a permission to remove container.`,
 
 				if len(res.IDList()) != 0 {
 					commonCmd.ExitOnErr(cmd, "",
-						fmt.Errorf("Container wasn't removed because LOCK objects were found.\n"+
-							"Use --%s flag to remove anyway.", commonflags.ForceFlag))
+						fmt.Errorf("container wasn't removed because LOCK objects were found, "+
+							"use --%s flag to remove anyway", commonflags.ForceFlag))
 				}
 			}
 		}