Quote and indent %B::Concise::priv initialisation consistently

- use qw() for all word lists
- use double quotes for single strings (only) where necessary
- hanging indent after opening operator/paren

No difference in the resulting data structure, as verified with:

  ./perl -Ilib -MData::Dumper -MB::Concise -e 'package Data::Dumper {
    $Sortkeys = $Terse = $Useqq = $Deepcopy = 1; $Quotekeys = 0 }
    print Dumper(\%B::Concise::priv)'

Bump B::Concise $VERSION.

For: RT #118609.