Does not parse testml out of the box

[xaviershay]

> cat Gemfile.lock 
GEM
  remote: https://rubygems.org/
  specs:
    pegex (0.0.3)

PLATFORMS
  ruby

DEPENDENCIES
  pegex
> bundle exec ruby -ropen-uri -rpegex -e 'pegex(open("https://raw.githubusercontent.com/ingydotnet/testml-pgx/master/testml.pgx").read, Class.new)'
/Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:255:in `throw_error': Error parsing Pegex document: (Pegex::Parser::PegexParseError)
  msg:      Rule header syntax error
  line:     5
  column:   1
  context:  testml-document:\n  code-section\n  data-section?\n\n#
            ^
  position: 46 (46 pre-lookahead)
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:221:in `match_err'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:213:in `block in match_any'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:212:in `each'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:212:in `match_any'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:174:in `match_ref'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:197:in `block in match_all'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:196:in `each'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:196:in `match_all'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:174:in `match_ref'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:213:in `block in match_any'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:212:in `each'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:212:in `match_any'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:197:in `block in match_all'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:196:in `each'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:196:in `match_all'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `call'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:131:in `match_next'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:174:in `match_ref'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:58:in `parse'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/compiler.rb:32:in `parse'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/compiler.rb:20:in `compile'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/grammar.rb:19:in `make_tree'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/grammar.rb:8:in `initialize'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex.rb:13:in `new'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex.rb:13:in `block in pegex'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex/parser.rb:23:in `initialize'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex.rb:12:in `new'
    from /Users/xavier/.rvm/gems/ruby-2.1.2/gems/pegex-0.0.3/lib/pegex.rb:12:in `pegex'
    from -e:1:in `<main>'
> 

I would expect this to work. Also fails on yaml.pgx.