Fix for issue 1058

[zaneenders]

This PR is working on #1058.

⚠️ I gotta hit pause on this for a few days. But I have a hunch this might be a bit more complicated as I don't know if Odyssey supports Preprocessing right now.

If you look at the Diff the the /alternatives route ignores preprocessing right now. I have some hacks and copied code to try and get this to work but running into the following error from the proceeding mathjs call..

Converting to Math.js #<syntax:web::1 "x_m = (fabs.f64 x)\n(FPCore (x_m) :precision binary64 x_m)">...Error handling request: match: no matching clause for "x_m = (fabs.f64 x)\n(FPCore (x_m) :precision binary64 x_m)"
  location...:
   src/reports/core2mathjs.rkt:155:6
  context...:
   /Users/zane/.scribe/Projects/herbie/src/reports/core2mathjs.rkt:149:0: core->mathjs
   /Users/zane/.scribe/Projects/herbie/src/api/demo.rkt:511:27
   /Users/zane/.scribe/Projects/herbie/src/api/demo.rkt:240:2
   /opt/homebrew/Cellar/minimal-racket/8.15/share/racket/collects/racket/contract/private/arrow-higher-order.rkt:375:33
   [repeats 1 more time]
   /opt/homebrew/opt/minimal-racket/share/racket/pkgs/web-server-lib/web-server/dispatchers/dispatch-servlets.rkt:63:2
   /opt/homebrew/opt/minimal-racket/share/racket/pkgs/web-server-lib/web-server/private/dispatch-server-with-connect-unit.rkt:141:2

I'm not sure where and what the fix should be yet but I know what the problem is.

Below is the correct view on the demo the Edward pointed out in the issue.