Andrej Kolchin 5d5088b5d5 Match ++= capabilities with ++ (#11130) ...

Allow `++=` to work in all situations `++` does, namely for appending
single elements: `$list ++= 1`.

Resolve #11087

# Description

Bring `++=` to parity with `++`.

# User-Facing Changes

It is now possible to do `$list ++= 1` (appending a single element).
Similarly, this can be done:

```Nushell
~> mut a = [1]
~> $a ++= 2
~> a
╭───┬───╮
│ 0 │ 1 │
│ 1 │ 2 │
╰───┴───╯
```

# Tests + Formatting

Added two tests:

- `commands::assignment::append_assign::append_assign_single_element`
- `commands::assignment::append_assign::append_assign_to_single_element`

2023-12-07 05:46:37 +08:00

..

append_assign.rs

Match ++= capabilities with ++ (#11130)

2023-12-07 05:46:37 +08:00

mod.rs

++= appendAssign operator (#7346) (#7354)

2022-12-09 11:20:58 -05:00