Rendering bug with icons wider than one column (gap in background)

[ghillb]

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Windows Terminal version

1.14.1962.0

Windows build number

10.0.19044.1826

Other Software

• WSL Ubuntu 22.04
• nvim 0.7.2,
• FiraCode Retina NerdFont.
• lualine nvim plugin (example appears anywhere where an icon is rendered in front of solid background)

Steps to reproduce

• Install FiraCode NF (https://github.com/ryanoasis/nerd-fonts/tree/master/patched-fonts/FiraCode)
• Install nvim 0.7.2 in ubuntu WSL
• Install lualine plugin (https://github.com/nvim-lualine/lualine.nvim)
• Open test xml file with nvim test.xml and observe rendering bug, where icon is rendered

Expected Behavior

No gap in rendering

alacritty (windows) or kitty (ubuntu), do not have this issue with the same font:

Actual Behavior

Gap in background highlight rendering, when icons wider than 1 column (e.g., xml file icon in nerd fonts) are rendered.

ms-terminal:

more info: https://github.com/nvim-lualine/lualine.nvim/issues/790

[zadjii-msft]

This might be fixed by the new experimental renderer. I think we've got some fixes in the works for 1.16 that might just address this. /cc @lhecker