Improve test builder

[ono-max]

There are two points I implemented.

1. q! and quit! matches not only debug commands, but also backtrace log.

Example

at_exit{
  binding.bp
  eval('a = 1')
  Thread.new{}
}

binding.bp(command: 'q!')

$ bin/gentest target.rb -c HelpTest -m test_help_with_undefined_command_shows_an_error
DEBUGGER: Session start (pid: 71085)
DEBUGGER: Thread #1 is created.
DEBUGGER: Thread #2 is created.
DEBUGGER: Load /Users/ono-max/workspace/debug/target.rb
[1, 7] in ~/workspace/debug/target.rb
=>    1| at_exit{
      2|   binding.bp
      3|   eval('a = 1')
      4|   Thread.new{}
      5| }
      6|
      7| binding.bp(command: 'q!')
=>#0	<main> at ~/workspace/debug/target.rb:1
INTERNAL_INFO: {"location":"~/workspace/debug/target.rb:1","line":1}

(rdbg)s
 s
[2, 7] in ~/workspace/debug/target.rb
      2|   binding.bp
      3|   eval('a = 1')
      4|   Thread.new{}
      5| }
      6|
=>    7| binding.bp(command: 'q!')
=>#0	<main> at ~/workspace/debug/target.rb:7
INTERNAL_INFO: {"location":"~/workspace/debug/target.rb:7","line":7}

(rdbg)q!
 q!
appended: /Users/ono-max/workspace/debug/test/tool/../debug/help_test.rb
    method: test_help_with_undefined_command_shows_an_error

Generated file(Now)

def test_help_with_undefined_command_shows_an_error
      debug_code(program) do
        type '' # we don't need this code
        type 's' # we don't need this code
        type 's'
        assert_line_num 7
        assert_line_text([
          /\[2, 7\] in .*/,
          /      2\|   binding\.bp/,
          /      3\|   eval\('a = 1'\)/,
          /      4\|   Thread\.new\{\}/,
          /      5\| \}/,
          /      6\| /,
          /=>    7\| binding\.bp\(command: 'q!'\)/,
          /=>\#0\t<main> at .*/
        ])
        type 'q!'
      end
    end

Generated file(Expected)

def test_help_with_undefined_command_shows_an_error
      debug_code(program) do
        type 's'
        assert_line_num 7
        assert_line_text([
          /\[2, 7\] in .*/,
          /      2\|   binding\.bp/,
          /      3\|   eval\('a = 1'\)/,
          /      4\|   Thread\.new\{\}/,
          /      5\| \}/,
          /      6\| /,
          /=>    7\| binding\.bp\(command: 'q!'\)/,
          /=>\#0\t<main> at .*/
        ])
        type 'q!'
      end
    end

2. Even one line, the parameter use array in test builder.

Now

def test_help_with_undefined_command_shows_an_error
      debug_code(program) do
        type ''
        type 'help foo'
        assert_line_text([
          /not found: foo/
        ])
        type 'q!'
      end
    end

Expected

def test_help_with_undefined_command_shows_an_error
      debug_code(program) do
        type 'help foo'
        assert_line_text(/not found: foo/)
        type 'q!'
      end
    end