Replaced nested bold with asterisks, with asterisks and underscores

src/MdToHtmlTest.hs

@@ -138,7 +138,7 @@ integrationTests =
             "# Sample Markdown\n\nThis is some basic, sample markdown.\n\n## Second \
             \Heading\n\n- Unordered lists, and:\n    1. One\n    2. Two\n    3. Three\n\
             \- More\n\n> Blockquote\n\nAnd **bold**, *italics*, and even *italics and \
-            \later **bold***. Even ~~strikethrough~~. [A link](https://markdowntohtml.com) to somewhere."
+            \later __bold__*. Even ~~strikethrough~~. [A link](https://markdowntohtml.com) to somewhere."
         )
     ]