Commits on Nov 9, 2023

1. Simplify the current_rustc_version macro. …

   It currently has the syntax
   `current_rustc_version!(env!("CFG_RELEASE"))` where the
   `env!("CFG_RELEASE")` part looks like a normal expression but it is
   actually parsed and processed by the `current_rustc_version` macro.
   
   The documented rationale for this is that you'll find it if you grep for
   `env!("CFG_RELEASE")`. But I think that's of very little use -- I would
   personally grep for just "CFG_RELEASE" -- and it complicates the macro,
   requiring the use of `syn`.
   
   This commit simplifies the macro.

   

   nnethercote committed Nov 9, 2023
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2. Minor cleanups. …

   - Reduce some function exposure.
   - Fix some comment formatting.

   

   nnethercote committed Nov 9, 2023
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3. Update instructions in a comment. …

   And avoid duplication.

   

   nnethercote committed Nov 9, 2023
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4. Factor out some duplicated code.

   

   nnethercote committed Nov 9, 2023
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