Canonical GF does not sort record fields consistently

[johnjcamilleri]

Record fields in canonical GF are generally always sorted (with s first, then the remainder alphabetically), except for when they are not. Example discovered in FoodsFin.gf.

After compiling to canonical format:

$ gf --batch --output-format=canonical_gf FoodsFin.gf
Writing canonical/Foods.gf...
Writing canonical/FoodsFin.gf...

We see the following in canonical/FoodsFin.gf:

lincat
  Kind = {
    s : ResFin_NForm => Str;
    h : ResFin_Harmony;
    postmod : ParamX_Number => Str
  };

lin
  Cheese = {
    s = table { ... };
    h = ResFin_Back;
    postmod = table { ... }
  };

Here the fields in both the lincat and the lin are sorted the same way: s, h, postmod.
But also in the same file:

lincat
  Quality = {
    s : Prelude_Bool => ResFin_NForm => Str;
    hasPrefix : Prelude_Bool;
    p : Str
  };

lin
  Expensive = {
    hasPrefix = Prelude_False;
    p = "";
    s = table { ... }
  };

Here the fields in the lin definition are not sorted in the same way.
This is not a GF error, but can cause problems if you assume sorting is done consistently.