RFR: JDK-8309297: Adjust ShenandoahHeap print_heap_regions_on

[Matthias Baesken]

On Thu, 1 Jun 2023 14:45:16 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> The ShenandoahHeap print_heap_regions_on method prints some brief description of the columns of the heap table, however the description is unsorted and seems to be not fully up to date.
> 
> Another thought - is the critical pins column (CP=critical pins)  still needed or always 0  and obsolete now?

Btw I also considered to add a table header  describing the columns, but was not sure if this is really desired?

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PR Comment: https://git.openjdk.org/jdk/pull/14264#issuecomment-1572216969