Ruby 1.9 hash symbol syntax

[Paxa]

New hash syntax was introduced in ruby 1.9 around 2009 (14 years ago?)

this patch will use new syntax when possible and add spaces around =>

What do you think about making this as default behavior?

module PP::PPMethods

  def pp_hash(obj)
    group(1, '{', '}') {
      seplist(obj, nil, :each_pair) {|key, v|
        group {
          if key.is_a?(Symbol)
            if key.to_s =~ /^[\w_][\w\d_]+$/i
              text "#{key}: "
            else
              text "'#{key}': "
            end
          else
            pp key
            text ' => '
          end
          group(1) {
            breakable ''
            pp v
          }
        }
      }
    }
  end

end

# example:

pp(
  "string key" => 1111,
  "33 symbol .": 222,
  symbol: 333,
  sub: {
    hash: {
      _aaa_aaaa_111: 444,
      something_else: "eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJhdWQiOlsiZ29qZWsiLCJtaWR0cmFucyIsImdvdml",
      "and" => "eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJhdWQiOlsiZ29qZWsiLCJtaWR0cmFucyIsImdvdml"
    }
  }
)

# prints

{"string key" => 1111,
 '33 symbol .': 222,
 symbol: 333,
 sub: 
  {hash: 
    {_aaa_aaaa_111: 444,
     something_else: "eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJhdWQiOlsiZ29qZWsiLCJtaWR0cmFucyIsImdvdml",
     "and" => "eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJhdWQiOlsiZ29qZWsiLCJtaWR0cmFucyIsImdvdml"}}}