Reproduce a $ escaping issue

Author: cknitt

tests/tests/src/dollar_escape_test.mjs

@@ -22,10 +22,17 @@ Mocha.describe("Dollar_escape_test", () => {
   });
 });
 
+function f($, $$1) {
+  let $$1 = $$1($);
+  let x = $$1(2);
+  return `$: ` + $$1 + ` ` + x;
+}
+
 export {
   $$,
   v,
   $$$plus,
   u,
+  f,
 }
 /*  Not a pure module */

tests/tests/src/dollar_escape_test.res

@@ -15,3 +15,9 @@ describe(__MODULE__, () => {
     eq(__LOC__, u, 3)
   })
 })
+
+let f = ($, $$1) => {
+  let $ = $$1($)
+  let x = $$1(2)
+  `$: ${$} ${x}`
+}