# sponge
> Soak up the input before writing the output file.
> More information: <https://manned.org/sponge>.
- Append file content to the source file:
`cat {{path/to/file}} | sponge -a {{path/to/file}}`
- Remove all lines starting with # in a file:
`grep -v '^{{#}}' {{path/to/file}} | sponge {{path/to/file}}`
