Missing cat command

[teeks99]

In gnu_sed.md around line 182, there should be an additional cat command that results in the output being shown.

This:

# original file gets preserved in 'greeting.txt.bkp'
Hi there
Have a nice day

Should be this instead:

# original file gets preserved in 'greeting.txt.bkp'
$ cat greeting.txt.bkp
Hi there
Have a nice day

[learnbyexample]

thanks, corrected it...