Style guide range placeholders need to be reformatted or removed

[Managor]

The current style guide instructions for range placeholders feels off and out of place

tldr/contributing-guides/style-guide.md

Line 435 in 261ba44

- Use a generic placeholder rather than an actual value where a generic placeholder is available (but there is an exception to this listed below). For example, use

The original that this replaced felt much more clear with its purpose
https://github.com/tldr-pages/tldr/pull/9718/files

And here is where it was finally removed
https://github.com/tldr-pages/tldr/pull/9793/files

What's funny is that the example in the style guide is not found in iostat
https://github.com/tldr-pages/tldr/blob/main/pages/linux/iostat.md

I don't know any pages where this is used.