Removed os specific terminal commands from introduction

Author: vikeri

getting-started/introduction.markdown

@@ -48,18 +48,21 @@ It seems we are ready to go! We will use the interactive shell quite a lot in th
 
 ## Running scripts
 
-After getting familiar with the basics of the language you may want to try writing simple programs. This can be accomplished by putting Elixir code into a file and executing it with `elixir`:
+After getting familiar with the basics of the language you may want to try writing simple programs. This can be accomplished by putting the following Elixir code into a file:
 
-```bash
-$ cat simple.exs
-IO.puts "Hello world
-from Elixir"
+```elixir
+IO.puts "Hello world from Elixir"
+
+```
 
+ Save it as `simple.exs` and execute it with `elixir`:
+
+```bash
 $ elixir simple.exs
-Hello world
-from Elixir
+Hello world from Elixir
 ```
 
+
 Later on we will learn how to compile Elixir code (in [Chapter 8](/getting-started/modules.html)) and how to use the Mix build tool (in the [Mix & OTP guide](/getting-started/mix-otp/introduction-to-mix.html)). For now, let's move on to [Chapter 2](/getting-started/basic-types.html).
 
 ## Asking questions