changes

README.md

 
 1. In this lab students will learn to navigate their file system using only the terminal
 
-2. Students will practice using the following commands to traverse directories and investigate their contents: `pwd`, `ls`, `cd`, `cat`, `less`, `grep`
+2. Students will practice using the following commands to traverse directories and investigate their contents: `pwd`, `ls`, `cd`, `cat`, `less`, `grep`...
 
 
 ## Overview