[perl #41053] [TODO] More useful dumping of Env PMC

[via RT]

# New Ticket Created by  Bernhard Schmalhofer 
# Please include the string:  [perl #41053]
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When dumping an Env PMC one currently gets something like:

  my env" => PMC 'Env' { ... }

This could be made more useful by using the generic Hash dumping 
functionality.