Policy: Should the spec annotate or have callouts based on Rust release versions?

[ehuss]

Should the spec ever mention Rust release versions, or differences between versions, or when something was introduced.

My preference is to never mention Rust versions. I think it generates clutter, which can balloon to a large amount of text. (Imagine if you annotated the entire document with description of what has changed and in which version, would likely end up marking up the majority of the document.)