messages.vroom

You can check message output with a `  ~ ` line. You must catch messages after
the command that causes them if you want it to work.

  :echomsg "Hello."
  ~ Hello.

This mechanism allows vroom to know what lines errors occur on. You can match
multiple messages on one command.

  :set cmdheight=99

  :echomsg "First" | echomsg "Second"
  ~ First
  ~ Second

Note sometimes multiple lines of output cause vroom to get stuck at a "Hit ENTER
to continue" prompt (typically in Neovim mode), and increasing cmdheight is a
simple workaround to avoid getting stuck. See
https://github.com/google/vroom/issues/83.

By default, vroom doesn't mind if you miss messages. It only minds if you miss
messages that vroom thinks look like error messages.

You can tweak this behavior with the --message-strictness flag.

For example, the test below will fail with --message-strictness=STRICT, because
the message is not caught.

  :echomsg "Third."