consolidate spread-related entries in changelog

CHANGELOG.md

@@ -4,8 +4,8 @@
 
 * Fix `{#each}` context not shadowing outer scope when using `bind:` ([#1565](https://github.com/sveltejs/svelte/issues/1565))
 * Fix edge cases in matching selectors against elements ([#1710](https://github.com/sveltejs/svelte/issues/1710))
+* Fix several bugs related to interaction of `{...spread}` attributes with other features ([#2721](https://github.com/sveltejs/svelte/issues/2721), [#3421](https://github.com/sveltejs/svelte/issues/3421), [#3681](https://github.com/sveltejs/svelte/issues/3681), [#3764](https://github.com/sveltejs/svelte/issues/3764), [#3790](https://github.com/sveltejs/svelte/issues/3790))
 * Allow exiting a reactive block early with `break $` ([#2828](https://github.com/sveltejs/svelte/issues/2828))
-* Don't lose `class:` directive classes on an element with `{...spread}` attributes when updating ([#3421](https://github.com/sveltejs/svelte/issues/3421))
 * Fix application of style scoping class in cases of ambiguity ([#3544](https://github.com/sveltejs/svelte/issues/3544))
 * Check attributes have changed before setting them to avoid image flicker ([#3579](https://github.com/sveltejs/svelte/pull/3579))
 * Fix generating malformed code for `{@debug}` tags with no dependencies ([#3588](https://github.com/sveltejs/svelte/issue/3588))
@@ -19,9 +19,6 @@
 * Flush changes in newly attached block when using `{#await}` ([#3660](https://github.com/sveltejs/svelte/issues/3660))
 * Throw exception immediately when calling `createEventDispatcher()` after component instantiation ([#3667](https://github.com/sveltejs/svelte/pull/3667))
 * Fix globals shadowing contextual template scope ([#3674](https://github.com/sveltejs/svelte/issues/3674))
-* Fix error resulting from trying to set a read-only property when spreading element attributes ([#3681](https://github.com/sveltejs/svelte/issues/3681))
-* Fix handling of boolean attributes in presence of other spread attributes ([#3764](https://github.com/sveltejs/svelte/issues/3764))
-* Fix handling of style scoping class in presence of spread attributes ([#3790](https://github.com/sveltejs/svelte/issues/3790))
 
 ## 3.12.1