有没有给txt文件自动换行的软件？

[KarmaPolice]

比如说把以下这么一行文本：

引用

American college students live in a society that is, by historical standards, incredibly well-educated, literate, and word-oriented. Yet most college students don't write very well. Even from bright students I kept seeing the same problems: poor thesis statements, pomposity and overuse of the passive voice, rambling paragraphs, awkward quotations, and unconvincing use of evidence. I've seen more bad writing in my 15 years of college teaching than I care to think about.

转成下面的格式：

引用

American college students live in a society that is, by historical standards,
incredibly well-educated, literate, and word-oriented. Yet most college
students don't write very well. Even from bright students I kept seeing the
same problems: poor thesis statements, pomposity and overuse of the passive
voice, rambling paragraphs, awkward quotations, and unconvincing use of
evidence. I've seen more bad writing in my 15 years of college teaching than
I care to think about.

即每行不超过80个字符，只在空格处换行（同一个单词不会被拆成两行）。有什么办法吗？

[akmm88]

一条正则就行吧

[mohugomohu]

string.Subtring

[anicesunday]

正则表达式！