smells-and-heuristics-comments.markdown

@@ -3,7 +3,7 @@
 ---
 
 
-[<- Introduction](smells-and-heuristics-introduction) | [Environment -> ](smells-and-heuristics-environment)
+[&#9664; Introduction](smells-and-heuristics-introduction) | [Environment &#9654; ](smells-and-heuristics-environment)
 
 # Comments
 
@@ -62,4 +62,4 @@ When you see commented-out code, delete it! Don't worry, the source code control
 
 ---
 
-[<- Introduction](smells-and-heuristics-introduction) | [Environment -> ](smells-and-heuristics-environment)
+[&#9664; Introduction](smells-and-heuristics-introduction) | [Environment &#9654; ](smells-and-heuristics-environment)
\ No newline at end of file