More compact output from PP.singleline_pp by omitting spaces

compact_singleline_pp.rb

require 'pp'

class PP
  class CompactSingleLine < SingleLine
    # output comma separators as "," instead of ", " to save bytes
    def comma_breakable
      text ","
    end
  end

  def PP.compact_singleline_pp(obj, out=$>)
    q = CompactSingleLine.new(out)
    q.guard_inspect_key {q.pp obj}
    q.flush
    out
  end
end

PP.singleline_pp([1, 2, 3, {:foo => 'bar'}], "")
# => "[1, 2, 3, {:foo=>\"bar\"}]" 

PP.compact_singleline_pp([1, 2, 3, {:foo => 'bar'}], "")
# => "[1,2,3,{:foo=>\"bar\"}]"