work around numeric ids not being valid css selectors when prepended with #.

Author: botandrose-machine

src/idiomorph.js

@@ -548,8 +548,8 @@ var Idiomorph = (function () {
       const target =
         /** @type {Element} - will always be found */
         (
-          ctx.target.querySelector(`#${id}`) ||
-            ctx.pantry.querySelector(`#${id}`)
+          ctx.target.querySelector(`[id="${id}"]`) ||
+            ctx.pantry.querySelector(`[id="${id}"]`)
         );
       removeElementFromAncestorsIdMaps(target, ctx);
       moveBefore(parentNode, target, after);