Markdown code blocks part 6 (#20292)

compiler/astalgo.nim

@@ -227,11 +227,10 @@ proc getNamedParamFromList*(list: PNode, ident: PIdent): PSym =
   ## Named parameters are special because a named parameter can be
   ## gensym'ed and then they have '\`<number>' suffix that we need to
   ## ignore, see compiler / evaltempl.nim, snippet:
-  ##
-  ## .. code-block:: nim
-  ##
+  ##   ```
   ##   result.add newIdentNode(getIdent(c.ic, x.name.s & "\`gensym" & $x.id),
   ##            if c.instLines: actual.info else: templ.info)
+  ##   ```
   for i in 1..<list.len:
     let it = list[i].sym
     if it.name.id == ident.id or