右側折り返し（Pythonの場合）

#! /user/local/bin/python

maxlength = 72
text=""

def insert_sp(i,text,line):
        if i!=0 and (i)%maxlength ==0:
                text = text + "\n"

        if line[i] == "\n":
                print text
        else:
                text = text + line[i]
                insert_sp(i+1,text,line)

for line in open('../data_c.txt','r'):
        insert_sp(0,text,line)