It seems to have been lost in 88d47bbd69.
Probably by accident?
I also pulled the literal bits into the format string. It looks more
readable to me that way. I'm happy to remove that if it's not desired.
Before this patch, with a `.tool-versions` file like:
```
lfe ref:master
```
`get_preset_version_for` would return `ref` instead of `ref:master`.
Same was happening for `path:` versions. Actually there was PR #95
on which I based my changes but instead of using space as delimiter
I went for using `|` which would be a lot more weird if present as
part of a file path, this also allows to specify paths which have
spaces which are much more frequent.
Closes#94#95
* Rename `asdf which` -> `asdf current`
* Output `set by $path` with current command
* Use dummy plugin in current_command test
* Hide "set by" message if derived from legacy file
