remove unwanted spacing around the list in block editor (#19521)

* remove unwanted spacing around the list in block editor

* fix spacing issue

---------

Co-authored-by: karanh37 <karanh37@gmail.com>

openmetadata-ui/src/main/resources/ui/src/utils/BlockEditorUtils.test.ts

@@ -10,7 +10,10 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-import { getTextFromHtmlString } from './BlockEditorUtils';
+import {
+  getHtmlStringFromMarkdownString,
+  getTextFromHtmlString,
+} from './BlockEditorUtils';
 
 describe('getTextFromHtmlString', () => {
   it('should return empty string when input is undefined', () => {
@@ -72,3 +75,45 @@ describe('getTextFromHtmlString', () => {
     expect(getTextFromHtmlString(input)).toBe(output);
   });
 });
+
+describe('getHtmlStringFromMarkdownString', () => {
+  it('should return the same string if input is already HTML', () => {
+    const input = '<p>Hello World</p>';
+
+    expect(getHtmlStringFromMarkdownString(input)).toBe(input);
+  });
+
+  it('should convert markdown to HTML', () => {
+    const input = 'Hello **World**';
+    const expectedOutput = '<p>Hello <strong>World</strong></p>';
+
+    expect(getHtmlStringFromMarkdownString(input)).toBe(expectedOutput);
+  });
+
+  it('should handle empty string', () => {
+    expect(getHtmlStringFromMarkdownString('')).toBe('');
+  });
+
+  it('should preserve special characters in markdown', () => {
+    const input = 'Hello & World! @ #$%^';
+    const expectedOutput = '<p>Hello &amp; World! @ #$%^</p>';
+
+    expect(getHtmlStringFromMarkdownString(input)).toBe(expectedOutput);
+  });
+
+  it('should handle complex markdown structure', () => {
+    const input = `
+      ## Demo Title
+      Small Subtitle.
+      - Item 1
+      - Item 2
+    `;
+    const expectedOutput = `
+      <pre><code>##DemoTitleSmallSubtitle.-Item1-Item2</code></pre>
+    `;
+
+    expect(getHtmlStringFromMarkdownString(input).replace(/\s+/g, '')).toBe(
+      expectedOutput.replace(/\s+/g, '')
+    );
+  });
+});

openmetadata-ui/src/main/resources/ui/src/utils/BlockEditorUtils.ts

@@ -139,6 +139,12 @@ const _convertMarkdownStringToHtmlString = new Showdown.Converter({
   ellipsis: false,
 });
 
+export const getHtmlStringFromMarkdownString = (content: string) => {
+  return isHTMLString(content)
+    ? content
+    : _convertMarkdownStringToHtmlString.makeHtml(content);
+};
+
 /**
  * Set the content of the editor
  * @param editor The editor instance
@@ -146,7 +152,7 @@ const _convertMarkdownStringToHtmlString = new Showdown.Converter({
  */
 export const setEditorContent = (editor: Editor, newContent: string) => {
   // Convert the markdown string to an HTML string
-  const htmlString = _convertMarkdownStringToHtmlString.makeHtml(newContent);
+  const htmlString = getHtmlStringFromMarkdownString(newContent);
 
   editor.commands.setContent(htmlString);