Use correct quoting
@ -511,7 +511,7 @@ sed -i '1s/^/[/' file
##### Add string at certain line number (e.g. add 'something' to line 1 and line 3)
```bash
sed -e '1isomething -e '3isomething'
sed -e '1isomething' -e '3isomething'
```
##### Add string to end of file (e.g. "]")
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