The "Spaces vs. Tabs" argument shouldn't be what stops you from joining hands and working together :)
A great advantage of rustfmt and friends is that I don't really have to care about my editor being correctly configured, I can just code without worrying about style and run rustfmt before comitting. But if the compiler outright rejects poorly formatted code it means that I have to run the format tool every time I want to compile or risk having my code rejected due to format issues. Now I have to care about my style again! It's the opposite of what I want.
I mean it's a very small issue and mainly a bikeshed, but that seems like an odd decision to me.
If your project is small, just run `zig fmt` on the command line.
If you have a large codebase, you can just incorporate it into your build process (similar to how clang-format and clang-tidy are used in CMake projects).
But again, if you have a large codebase written in Zig, you've probably already configured your editor to run `zig fmt` on save :)
At this point it means you're probably Andrew himself because the Zig compiler is the only large Zig codebase out there;)