$ cat file
Here's a line.
This line has one blank line above it.
This line has two blank lines above it.
This line has three blank lines above it.
This line has four blank lines above it.
$ cat file
Here's a line.
This line has one bl
阅读背景：
为什么这个“grep -P”不符合我的预期？
来源：互联网
分享到：
