Use markdown in blurb

docs/2023-09-15-open-an-iex-shell-from-an-elixir-script.md

@@ -1,6 +1,10 @@
 ---
 title: "Open An IEx Shell From An Elixir Script"
-blurb: "We can run an Elixir script with either the <code>elixir</code> or the <code>iex</code> command. Both will execute the code, but the second command opens an interactive IEx shell afterward. What if, we won't know until runtime whether we want a shell or not? How can we start an IEx session even when we use <code>elixir</code>, instead of <code>iex</code>, to run our script?"
+blurb: "We can run an Elixir script with either the `elixir` or the
+`iex` command. Both will execute the code, but the second command
+opens an interactive IEx shell afterward. What if, we won't know until runtime
+whether we want a shell or not? How can we start an IEx session even when we
+use `elixir`, instead of `iex`, to run our script?"
 ...
 
 I recently had occasion to want to start an IEx session from an Elixir script. Here's how I was able to do it.