I don't think that's the fix for if-then-else. This does:

[Abacha234]

I don't think that's the fix for if-then-else. This does:

       if gf then
         (* aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *)
-      begin if
-        a
-      then
-        b
-      end
+        begin if a then b
+        end

I think the right output would be:

       if gf then
         (* aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *)
       begin
         if a then b
       end

because without the comment it is:

       if gf then begin
         if a then b
       end

The body of the begin-end shouldn't reindent if a comment is added around it. This should be doable with boxes instead of adding a new special case.

Originally posted by @Julow in ocaml-ppx/ocamlformat#2810 (comment)