Slack hook only has 1 line of message

[ekevjn]

Your script work perfectly but when i entered multiple lines into message box, it just print out the last line.
I think this issue may cause by bindind variable line "set /p THEMSG=<%3"

[edencorbin]

Hey thanks for using the script and finding this issue, any chance you could post a PR, or were you able to get it working? If not I'll take a look at investigating that issue soon.