<<< is used with text strings. It can send a string to a command.
command <<< string
In this case the string stored at
$firstline is being sent to the command
read -a splitfirstline, which reads the string into an array. splitfirstline is the name of an array that is being created. It’s an argument for
-a so it’s not a variable in this case and doesn’t require a
Markdown is a file format that the file changelog.md uses. Markdown files have a file extension .md and are in plain text, that can be edited by any text editor. Markdown has its own formatting like
**bold text** for bold.
I think the lesson could include info on both these topics.