VimWasm.cmdline() does not update screen

[rhysd]

Describe the bug

VimWasm.cmdline() runs given command, but screen is not updated. To avoid this, appending | redraw to the command is necessary.

Steps To Reproduce

1. Visit https://rhysd.github.io/vim.wasm/?debug=1
2. Open DevTools console
3. Run vim.cmdline('edit ~/.vim/vimrc')

Expected behavior

Screen renders the content of ~/.vim/vimrc

Actual behavior

Screen is not updated though only statusline is updated to notify opening ~/.vim/vimrc

Screenshots/DevTools console (if possible)

Your environment

• OS: macOS 10.12
• Browser: Chrome (stable)
• Browser Version: 75

Additional context (if any)