Fix code formatting error

Author: fhammerschmidt

jscomp/gentype/TranslateStructure.ml

@@ -11,8 +11,7 @@ let rec addAnnotationsToTypes_ ~config ~(expr : Typedtree.expression)
     let aName =
       if aName = "*opt*" then
         match arg_label with
-        | Optional l ->
-          l
+        | Optional l -> l
         | _ -> "" (* should not happen *)
       else aName
     in