'window-width' line broken with ASCII 196 and hack in PowerShell

[OtterKring]

https://twitter.com/OtterKring/status/848869779268132864

When I draw a horizontal line across the whole window in powershell (Windows 10) with the hack font, it works when using dashes (creates a dashed line), but breaks in mid-window to a second line when using ASCII character 196.
Check my tweet for details. It works correctly with e.g. Lucida Console or Consolas font.

[mrmckeb]

I'm seeing this issue too, @chrissimpkins. I raised it as an issue against the Bash project for Windows - screenshot can be found there.
microsoft/WSL#1936

[chrissimpkins]

Following the linked report on Windows bash repo. Current information from microsoft/WSL#1936 (comment) is:

This looks like it's the same as #1879, but more specifically it's the bug in #1907. Basically, for some fonts, we can't get the size of all unicode characters correctly, and that can lead so strange rendering issues. Just as an example, running tmux and trying to make a vertical split ( " or split-window -v) with the Hack typeface will most definitely look wrong.

I'll leave this open as one extra node in the large graph of issues related to that bug. I don't think we have a fix planned for that anytime soon, it's a pretty tricky bug that one is.