Supporting '_' or '^' and '$' to move to the beginning and end of the logical line in Vi mode

[springcomp]

Currently, the ^ key moves the cursor to the first non-blank character of the input.
Likewise, the $ key moves the cursor to the very end of the input.

I would prefer those keys to be restricted to movements in the current logical line of a multi-line buffer.

I have prepared an implementation to this effect, but this touches the GotoFirstNonBlankOfLine and MoveToEndOfLinemethods.

https://github.com/lzybkr/PSReadLine/blob/274381a89e937d70d9fb1b4f77c7cbf38909db8e/PSReadLine/Movement.vi.cs#L194-L207

https://github.com/lzybkr/PSReadLine/blob/274381a89e937d70d9fb1b4f77c7cbf38909db8e/PSReadLine/Movement.vi.cs#L150-L156

What I'm concerned about is that those methods are public and probably relied on in existing scripts. Furthermore, the documentation for the MoveToEndOfLine method specifically states that it moves the cursor at the end of the input.

What could be the best way to introduce such a change?

[lzybkr]

I think it's very uncommon to use methods like these as an api - they are more often used for simple remapping of key bindings.

So from that perspective, I think it's relatively safe to change these methods, but it wouldn't hurt to wait a bit for some feedback before merging a change.

I'm also fine with you opening a PR and maybe someone will chime in on that - we can sit on the PR for some time as well.

[springcomp]

All right, thanks. That seems reasonable.