Use existing functions to convert to string.

Author: cristianoc

src/rescript-editor-support/PrintType.re

@@ -1,23 +1,15 @@
 let printExpr = typ => {
-  try(
-    Res_outcome_printer.printOutType(
-      Format.str_formatter,
-      Printtyp.tree_of_typexp(false, typ),
-    )
-  ) {
-  | _ => Format.fprintf(Format.str_formatter, "Unable to print type")
-  };
-  Format.flush_str_formatter();
+  Res_doc.toString(
+    ~width=60,
+    Res_outcome_printer.printOutTypeDoc(Printtyp.tree_of_typexp(false, typ)),
+  );
 };
 
 let printDecl = (~recStatus, name, decl) => {
-  try(
-    Res_outcome_printer.printOutSigItem(
-      Format.str_formatter,
+  Res_doc.toString(
+    ~width=60,
+    Res_outcome_printer.printOutSigItemDoc(
       Printtyp.tree_of_type_declaration(Ident.create(name), decl, recStatus),
-    )
-  ) {
-  | _ => Format.fprintf(Format.str_formatter, "Unable to print type")
-  };
-  Format.flush_str_formatter();
+    ),
+  );
 };