--- grep_notes_1.txt	2021-08-21 05:42:09.720892075 -0700
+++ grep_notes_2.txt	2021-08-21 05:39:02.414217690 -0700
@@ -19,4 +19,4 @@
 
 ##########################################################
 
-some text unique to grep1(compare these two files using the comm and diff(-u) commands)
+some text unique to grep2(compare these two files using the comm and diff(-u) commands)