:split Can't Open Files With Names That Include Spaces

[raisin-loaf]

I feel like I'm missing something blindingly obvious here but I can't quite work it out.

Describe the bug
:sp command can't open a file if its name includes a space.

To Reproduce
Change directory to a folder that includes files with spaces in their names. Type :sp plus the first few characters of the file name, hit tab to complete (which happens correctly, including the spaces). Press enter and a notification pops claiming that File: <path_to_working_directory>\<first_word_of_filename> does not exist.

For example - C:\Temp\My Test File.txt
Resulting notification - File: C:\Temp\My does not exist.

I've tried enclosing the file name in single quotes, double quotes and just about anything else I think might work without success.

Files without spaces open just fine.

Expected behavior
A horizontal split will open showing the file specified.

Environment

• Extension (VsCodeVim) version: 1.8.1
• VSCode version: 1.35.0
• OS: Windows 10

All advice very gratefully received!

[stevenguh]

I am working in a fix that fixes #3815 could fix this as well