dunsany

`..=` slicing exception messages are misleading

2

~~Currently `has-key` tries to parse slices the same way as indexing does. This leads to this:~~ ```elvish ~> has-key [a b c d] -1..4 ▶ $true ``` ~~In my opinion...

Freeze after background Elvish process exits

1

```elvish ~> elvish -c '' & job elvish -c '' & finished ``` This causes the shell to become unresponsive. The same happens with this: ```elvish ~> elvish -c 'elvish...

Clarify the order of `$f[opt-names]` and `$f[opt-values]`

11

Currently those values in the function pseudo-map contain lists in the order exactly as defined - in contrast to `make-map`, for example, which seems to order its keys alphabetically: ```elvish...