Fix right-aligned blocks

[andriniaina]

This commit fixes right-aligned blocks in order to be closer to the unix shell implementation of Powerline.

Instead of adding a newline:

• we save the current cursor position using the ANSI escape char "ESC[s"
• write the right-aligned block
• restore the previous cursor position using the ANSI escape char "ESC[u"

more details : ANSI_escape_code#Terminal_output_sequences

[Jaykul]

Apart from just copying someone else's implementation of this, is there actually something wrong with the current implementation that you're trying to fix?

[andriniaina]

What do you mean copying someone else's implementation?

Maybe I am doing something wrong but with the existing code, I see this

promptleft1>promptLeft2>                                          <promptRight1
# my commands are written here

I expect this:

promptleft1>promptLeft2> # my commands are written here          <promptRight1

[andriniaina]

look at ZSH's implementation of powerline

[Jaykul]

As far as I know, putting anything on the right side cannot work with PowerShell's readline, because it rewrites the whole line after the prompt...

[andriniaina]

It's OK. You can close the issue. I don't use powerline anymore.