Default new pages to Markdown out of the box (Everywhere on by default)

extension.json

@@ -47,7 +47,7 @@
 		},
 		"NativeMarkdownEverywhere": {
 			"description": "If new pages should default to the markdown content model everywhere, except discussion, Template and MediaWiki namespaces and namespaces with an explicitly configured content model.",
-			"value": false
+			"value": true
 		},
 		"NativeMarkdownSuffixDetection": {
 			"description": "If new pages with a title ending in .md should default to the markdown content model.",

tests/phpunit/EntryPoints/MarkdownContentHandlerTest.php

@@ -47,7 +47,8 @@ public function testRendersMissingPageAsRedLink(): void {
 	}
 
 	public function testBatchedExistenceLookupKeepsBlueAndRedLinksApart(): void {
-		$this->getExistingTestPage( 'Batch Existing Page' );
+		// Only needs the target to exist; editPage works whatever the default model is.
+		$this->editPage( 'Batch Existing Page', 'It exists.' );
 
 		$output = $this->getParserOutput( 'Blue [[Batch Existing Page]] and red [[Batch Missing Page]]' );