Update MD018/no-missing-space-atx and MD020/no-missing-space-closed-atx to ignore the content of HTML blocks (fixes #1268).

test/ignore-html-block.md

@@ -0,0 +1,13 @@
+# ignore-html-block.md
+
+<style> {MD033}
+
+##Heading 1
+
+##  Heading 2
+
+##Heading 3##
+
+##  Heading 4  ##
+
+</style>

test/snapshots/markdownlint-test-scenarios.js.md

@@ -19683,6 +19683,45 @@ Generated by [AVA](https://avajs.dev).
       `,
     }
 
+## ignore-html-block.md
+
+> Snapshot 1
+
+    {
+      errors: [
+        {
+          errorContext: null,
+          errorDetail: 'Element: style',
+          errorRange: [
+            1,
+            7,
+          ],
+          fixInfo: null,
+          lineNumber: 3,
+          ruleDescription: 'Inline HTML',
+          ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md033.md',
+          ruleNames: [
+            'MD033',
+            'no-inline-html',
+          ],
+        },
+      ],
+      fixed: `# ignore-html-block.md␊
+      ␊
+      <style> {MD033}␊
+      ␊
+      ##Heading 1␊
+      ␊
+      ##  Heading 2␊
+      ␊
+      ##Heading 3##␊
+      ␊
+      ##  Heading 4  ##␊
+      ␊
+      </style>␊
+      `,
+    }
+
 ## inconsistent_bullet_indent_same_level.md
 
 > Snapshot 1