Fix codeblock detection to catch blocks not on first Lines

extensions/typescript-language-features/src/utils/previewer.ts

@@ -39,24 +39,16 @@ function getTagBodyText(
 		return undefined;
 	}
 
-	// Convert to markdown code block if it is not already one
+	// Convert to markdown code block if it does not already contain one
 	function makeCodeblock(text: string): string {
-		if (text.match(/^\s*[~`]{3}/g)) {
+		if (text.match(/^\s*[~`]{3}/m)) {
 			return text;
 		}
 		return '```\n' + text + '\n```';
 	}
 
 	const text = convertLinkTags(tag.text, filePathConverter);
 	switch (tag.name) {
-		case 'example':
-			// check for caption tags, fix for #79704
-			const captionTagMatches = text.match(/<caption>(.*?)<\/caption>\s*(\r\n|\n)/);
-			if (captionTagMatches && captionTagMatches.index === 0) {
-				return captionTagMatches[1] + '\n\n' + makeCodeblock(text.substr(captionTagMatches[0].length));
-			} else {
-				return makeCodeblock(text);
-			}
 		case 'author':
 			// fix obsucated email address, #80898
 			const emailMatch = text.match(/(.+)\s<([-.\w]+@[-.\w]+)>/);
@@ -66,6 +58,7 @@ function getTagBodyText(
 			} else {
 				return `${emailMatch[1]} ${emailMatch[2]}`;
 			}
+		case 'example':
 		case 'default':
 			return makeCodeblock(text);
 	}