Remove warning 20

packages/squiggle-lang/bsconfig.json

@@ -37,7 +37,7 @@
   },
   "refmt": 3,
   "warnings": {
-    "number": "+A-42-48-9-30-4-102-20"
+    "number": "+A-42-48-9-30-4-102"
   },
   "ppx-flags": [
     ["../../node_modules/bisect_ppx/ppx", "--exclude-files", ".*_test\\.res$$"]

packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_Eval.res

@@ -12,7 +12,7 @@ type answer = {"value": unit}
  Rescript cannot type cast on basic values passed on their own.
  This is why we call evalua inside Javascript and wrap the result in an Object
  */
-let eval__ = %raw(`function (expr) { return {value: Mathjs.evaluate(expr)}; }`)
+let eval__: string => 'a = %raw(`function (expr) { return {value: Mathjs.evaluate(expr)}; }`)
 
 /*
   Call MathJs evaluate and return as a variant

packages/squiggle-lang/src/rescript/Utility/XYShape.res

@@ -229,7 +229,7 @@ module Zipped = {
 
 module PointwiseCombination = {
   // t1Interpolator and t2Interpolator are functions from XYShape.XtoY, e.g. linearBetweenPointsExtrapolateFlat.
-  let combine = %raw(` // : (float => float => float, T.t, T.t, bool) => T.t
+  let combine: ((float, float) => float, interpolator, T.t, T.t) => T.t = %raw(`
       // This function combines two xyShapes by looping through both of them simultaneously.
       // It always moves on to the next smallest x, whether that's in the first or second input's xs,
       // and interpolates the value on the other side, thus accumulating xs and ys.