Update test-markdown-basics.md (#5655)

tests/test-markdown-basics.md

@@ -4,12 +4,13 @@ Tests for text style, code blocks, in-line code and images, lines, block quotes,
 ### Text Style
 
 **The following text should render as:**  
-_Italics_  
+_Italics_
-*Italics*  
+_Ita_lics_
-**Bold**  
+*Italics*
-***Bold-italics***  
+**Bold**
-**_Bold-italics_**  
+***Bold-italics***
-~~Strikethrough~~  
+**_Bold-italics_**
+~~Strikethrough~~
 
 This sentence contains **bold**, _italic_, ***bold-italic***, and ~~stikethrough~~ text.