Josh Goldstein emailed me a nice tip for @r_data_table chaining: if we start a chained `data.table` operation inside a set of parens, we are no longer subject to the 'REPL constraint' and can keep each operation on a line. See ALT text. #rstats

Now in the pdf at https://github.com/eddelbuettel/gsir-te

@eddelbuettel @r_data_table wow. I like it a lot. Thanks for sharing.
@jrosell @r_data_table I had to squint a few times too before I believed it, and quite like it now. Odd that nobody (?) had come up with this before in all these decades (!!) with `data.table`. Credit and thanks to Josh.
@eddelbuettel @r_data_table FYI, I've asked for air formatter support to this parenthesised [] pipelines https://github.com/posit-dev/air/issues/474

@eddelbuettel @r_data_table You can also use the pipe.

```
DT[operations] |>
_[more operations]
```