As an editor, I want to be sure that when I “edit” a Schema, but don’t make any actual changes, then no edit to the page is made.
Currently, it’s possible that an edit is made even if there is no difference, because the underlying JSON serialization may change.
[This diff](https://wikidata-shex.wmflabs.org/wiki/Special:Diff/103/104) is empty, but in the underlying JSON representation, the `aliases` changed from having `"de": , "fr": , "nl": ` in [revision 103](https://wikidata-shex.wmflabs.org/w/index.php?oldid=103&action=raw) not not having those empty lists anymore in [revision 104](https://wikidata-shex.wmflabs.org/w/index.php?oldid=104&action=raw).
WHEN I go to edit a schema
AND I only add whitespace at the beginning or end of labels, descriptions, aliases, or schema text
THEN no edit is recorded in the page history when I save
* There are two ways we can tackle this (not necessarily exclusive). Which one(s) do we want to pursue?
* Try to always generate the same JSON (strip empty `aliases` arrays, consistent key order, etc.). However, this will still produce empty edits if the serialization version changes.
* Diff the old and new Schema and don’t save if the difference is empty.