Stefan Holderbach 33e1120add
Terminate REPL if not connected to tty input (#6480)
* Terminate REPL if not connected to tty input

If the standard input stream is not a TTY abort the REPL execution.

Solves a problem as the current REPL tries to be IO fault tolerant and
would indefinetely fail when crossterm tries to handle the STDIN.

Fixes nushell/nushell#6452

* Improve the error message
2022-09-05 13:33:54 +02:00
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