spelling: nonexistent

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

CHANGELOG.md

@@ -1204,7 +1204,7 @@ Also:
 ## 2.12.0
 
 * Initialise actions on mount rather than hydrate ([#1653](https://github.com/sveltejs/svelte/pull/1653))
-* Allow non-existent components to be destroyed ([#1677](https://github.com/sveltejs/svelte/pull/1677))
+* Allow nonexistent components to be destroyed ([#1677](https://github.com/sveltejs/svelte/pull/1677))
 * Pass AMD ID from CLI correctly ([#1672](https://github.com/sveltejs/svelte/pull/1672))
 * Minor AST tweaks ([#1673](https://github.com/sveltejs/svelte/pull/1673), [#1674](https://github.com/sveltejs/svelte/pull/1674))
 * Reduce code duplication in component initialisation ([#1670](https://github.com/sveltejs/svelte/pull/1670))

test/runtime/samples/each-block-dynamic-else-static/_config.js

@@ -16,7 +16,7 @@ export default {
 		` );
 
 		// trigger an 'update' of the else block, to ensure that
-		// non-existent update method is not called
+		// nonexistent update method is not called
 		component.animals = [];
 
 		component.animals = ['wombat'];