Exclude htmlFlow content by default for filterByTypes, opt in as needed.

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

@@ -16101,6 +16101,12 @@ Generated by [AVA](https://avajs.dev).
       ## Heading 2␊
       ␊
       #### Heading 4 {MD001}␊
+      ␊
+      <p>␊
+      ###### Not heading␊
+      </p>␊
+      ␊
+      <!-- markdownlint-disable-file no-inline-html -->␊
       `,
     }
 
@@ -39577,6 +39583,22 @@ Generated by [AVA](https://avajs.dev).
             'no-alt-text',
           ],
         },
+        {
+          errorContext: null,
+          errorDetail: null,
+          errorRange: [
+            3,
+            23,
+          ],
+          fixInfo: null,
+          lineNumber: 68,
+          ruleDescription: 'Images should have alternate text (alt text)',
+          ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md045.md',
+          ruleNames: [
+            'MD045',
+            'no-alt-text',
+          ],
+        },
       ],
       fixed: `# Images with and without alternate text␊
       ␊
@@ -39644,6 +39666,10 @@ Generated by [AVA](https://avajs.dev).
       ␊
       Uppercase image tag with no alt set <IMG SRC="cat.png" /> {MD045}␊
       ␊
+      <p>␊
+        <img src="image.png" /> {MD045}␊
+      </p>␊
+      ␊
       <!-- markdownlint-restore no-inline-html -->␊
       ␊
       [notitle]: image.jpg␊