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#!/bin/bash -u

...
  done

fi

      my $fmt;      # prototypes are documentary (rt#89053)
      my $given = [ sub ($$) { $_[0] =~ /^[-+]?[0-9]+\.?\z/     && q{%
+s}  },
...

      do { $fmt = $_->($v, $ro) and last } for @$given;
      return sprintf $fmt, $v;

      no strict 'refs';
      my %actions = ( 
...
                    sort  nonrefs_b4_refs keys %$v]} ) . '}' },);
      if (my $act=$actions{$ref}) { &$act } 
      else { return "$v" }