haiku.go

package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	filename := os.Args[1]

	file, err := os.Open(filename)
	if err != nil {
		panic(err)
	}
	r := bufio.NewReader(file) // the magic happens here
	for {
		line, err := r.ReadString('\n')
		if err != nil {
			fmt.Println(err)
			break
		}
		fmt.Printf("%s", line)
	}
}

test.txt

An afternoon breeze
expels cold air, along with
the fallen brown leaves.

Cherry blossoms bloom,
softly falling from the tree,
explode into night.

地理
 湖沼
  ダム湖