tabify
more test coverage and comments
fix GitHub #122: "x64" being parsed as x operator plus number

fixes #122
fixes #123
PPI::Test::pragmas for test files instead of boilerplate

Conflicts:
	t/ppi_statement_package.t
	t/ppi_statement_sub.t
	t/ppi_token_operator.t
t::lib::PPI::Test::pragmas for a release test
typo fixes
test refactoring and coverage
unescape results from PPI::Token::QuoteLike::Words::literal

fixes #124
fixes #127
use xdigit character class -- fix #100