Markdownlint: Fix TOP009 errors in existing custom rule test files (#30060)

* Fix TOP009 errors in existing custom rule test files

* Disable TOP008 for TOP006 test file

Test file should showcase TOP006 only. TOP008 violation is intentional here, just don't flag it due to error noise.

Author: mao-sz

markdownlint/TOP001_descriptiveLinkTextLabels/tests/TOP001_test.md

@@ -6,7 +6,7 @@ Text content
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### The following links should NOT be flagged
 

markdownlint/TOP002_noCodeInHeadings/tests/TOP002_test.md

@@ -6,7 +6,7 @@ Text content.
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### This heading should NOT be flagged
 

markdownlint/TOP003_defaultSectionContent/tests/TOP003_test_content-around-list.md

@@ -8,7 +8,7 @@ This section contains a general overview of topics that you will learn in this l
 
 Some additional content before the list that should flag an error.
 
-- LO item
+- LO item.
 
 Some additional content after the list that should flag an error.
 

markdownlint/TOP003_defaultSectionContent/tests/TOP003_test_incorrect-content.md

@@ -6,7 +6,7 @@ Text content
 
 This section has the wrong text following the heading that should flag an error.
 
-- LO item
+- LO item.
 
 ### Custom section
 

markdownlint/TOP003_defaultSectionContent/tests/TOP003_test_missing-wrapper.md

@@ -6,7 +6,7 @@ Text content
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### Custom section
 

markdownlint/TOP003_defaultSectionContent/tests/TOP003_test_nested-and-ordered-list.md

@@ -6,9 +6,9 @@ Text content
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- An item
-  - A nested item that should flag an error
-- Unnested list item
+- An item.
+  - A nested item that should flag an error.
+- Unnested list item.
 
 ### Custom section
 

markdownlint/TOP004_lessonHeadings/tests/TOP004_test_valid.md

@@ -6,7 +6,7 @@ This file should not be flagged with any errors.
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### Custom section
 

markdownlint/TOP005_blanksAroundMultilineHtmlTags/tests/TOP005_test.md

@@ -6,7 +6,7 @@ This file should flag with TOP005 errors, and no other linting errors.
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### Assignment
 

markdownlint/TOP006_fullFencedCodeLanguage/tests/TOP006_test.md

@@ -6,7 +6,7 @@ This file should flag with TOP006 errors, and no other linting errors.
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### Assignment
 
@@ -22,9 +22,11 @@ Valid div due to each tag being surrounded by blank lines.
 console.log("This code block should flag an error as it uses "js" instead of "javascript".");
 ```
 
+<!-- markdownlint-disable TOP008 -->
 ~~~js
 console.log("The rule will still flag even if tilde delimiters are used");
 ~~~
+<!-- markdownlint-enable TOP008 -->
 
 ```javascript
 console.log("This code block is valid as it uses the appropriate full name.");

markdownlint/TOP007_useMarkdownLinks/tests/TOP007_test.md

@@ -6,7 +6,7 @@ This file should flag with TOP007 errors, and no other linting errors.
 
 This section contains a general overview of topics that you will learn in this lesson.
 
-- LO item
+- LO item.
 
 ### Assignment