insert_before() fails with comment

[connellybarnes]

The insert_before() method does not succeed if its string contains a single comment. Same deal for insert_after().

For example:

>>> s = """
... def f():
...   a = 10
...   for i in range(10):
...     j += i
... """
>>> 
>>> r=redbaron.RedBaron(s)
>>> fornode=r.find_all('ForNode')[0]
>>> fornode.insert_before('#comment')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 1013, in insert_before
    self.parent.insert(self.index_on_parent - offset, value)
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 1242, in insert
    value = self._convert_input_to_node_object(value, parent=self.node_list, on_attribute=self.on_attribute)
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 1184, in _convert_input_to_node_object
    return self.node_list.parent._convert_input_to_node_object_list(value, parent, on_attribute).filtered()[0]
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 165, in _convert_input_to_node_object_list
    return self._string_to_node_list(value, parent=parent, on_attribute=on_attribute)
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 2172, in _string_to_node_list
    return super(DefNode, self)._string_to_node_list(string, parent, on_attribute)
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 1022, in _string_to_node_list
    return self.parse_code_block(string, parent=parent, on_attribute=on_attribute)
  File "/usr/local/lib/python2.7/site-packages/redbaron.py", line 1038, in parse_code_block
    fst = baron.parse("def a():\n%s\n" % clean_string)[0]["value"]
  File "/usr/local/lib/python2.7/site-packages/baron/baron.py", line 51, in parse
    tokens = tokenize(source_code, False)
  File "/usr/local/lib/python2.7/site-packages/baron/baron.py", line 72, in tokenize
    return mark_indentation(inner_group(space_group(_tokenize(group(split(pouet)), print_function))))
  File "/usr/local/lib/python2.7/site-packages/baron/indentation_marker.py", line 24, in mark_indentation
    return list(mark_indentation_generator(sequence))
  File "/usr/local/lib/python2.7/site-packages/baron/indentation_marker.py", line 67, in mark_indentation_generator
    indentations.append(get_space(i))
  File "/usr/local/lib/python2.7/site-packages/baron/indentation_marker.py", line 31, in get_space
    if len(node[3]) == 0:
IndexError: tuple index out of range

[ibizaman]

This looks like it is related to #54.

Can you try:

>>> fornode.insert_before(RedBaron('#comment'))