Updated SC2009 (markdown)

SC2009.md

@@ -18,7 +18,7 @@ If you are just after a pid from a running program, then pgrep is a much safer a
 
 If you want a field that's not the pid, consider doing this through `ps` + `pgrep` instead of `ps` + `grep`:
 
-```
+```sh
 for pid in $(pgrep '^python$')
 do
   user=$(ps -o user= -p "$pid")