Spelled out EMRFS in Python code example

Author: Doug-AWS

python/example_code/emr/emrfs_step.py

@@ -4,7 +4,7 @@
 """
 Purpose
 
-Shows how to run an EMRFS command as a job step on an Amazon EMR cluster. This
+Shows how to run an electronic medical record file system (EMRFS) command as a job step on an Amazon EMR cluster. This
 can be used to automate EMRFS commands and is an alternative to connecting through
 SSH to run the commands manually.
 """