Bug 1781061 - Part 0: Do not use Array.from in eager evaluation test.…

… r=nchevobbe

`Array.from` on an iterable object internally calls
`%ArrayIteratorPrototype%.next`, which is effectful.

The later patches will add more coverage inside for-of loop inside
self-hosted JS, and that will expose the call on `obj[Symbol.iterator]().next`,
which can be `%ArrayIteratorPrototype%.next` or any other function.

Differential Revision: https://phabricator.services.mozilla.com/D153153

devtools/client/webconsole/test/browser/browser_jsterm_autocomplete_eager_evaluation.js

@@ -19,7 +19,7 @@ add_task(async function() {
   const cases = [
     { input: "testObj.fun().y", results: ["yay", "yo"] },
     {
-      input: `Array.from([1,2,3]).reduce((i, agg) => agg + i).toS`,
+      input: `Array.of(1,2,3).reduce((i, agg) => agg + i).toS`,
       results: ["toString"],
     },
     { input: `1..toE`, results: ["toExponential"] },