Remove trailing newline from log calls

[eest]

This way there is no need to clean up a newline when implementing your own goose.Logger. The standard log package being used by default will add a newline if it is not there.

For reference, I noticed this when trying to implement a goose.Logger using https://github.com/rs/zerolog, looking like so:

type gooseLogger struct {
	logger zerolog.Logger
}

func (gl gooseLogger) Fatalf(format string, v ...interface{}) {
	gl.logger.Fatal().Msgf(format, v...)
}

func (gl gooseLogger) Printf(format string, v ...interface{}) {
	gl.logger.Info().Msgf(format, v...)
}

Where the resulting log message ended up like this (note the trailing newline in message):

{"level":"info", "time":"2024-12-19T08:36:40+01:00","caller":"migrations.go:25","message":"goose: no migrations to run. current version: 1\n"}