doc: update grep.md example. (#361)

2022-04-28 15:37:07 +08:00 · 2022-04-28 15:37:07 +08:00 · 645d9de61d
parent 21c8007c93
commit 645d9de61d
1 changed files with 1 additions and 0 deletions
--- a/command/grep.md
+++ b/command/grep.md
@ -171,6 +171,7 @@ echo "hello world" | grep -i "HELLO"
 ```shell
 echo this is a text line | grep -e "is" -e "line" -o
 is
+is
 line

 #也可以使用 **-f** 选项来匹配多个样式，在样式文件中逐行写出需要匹配的字符。