[BUG] Parsing a Python module with EOL escape but no continuation fails

[webknjaz]

Traceback (most recent call last):
  File "./migrate.py", line 657, in <module>
    main()
  File "./migrate.py", line 650, in main
    assemble_collections(spec, args)
  File "./migrate.py", line 422, in assemble_collections
    plugin_data_new, import_dependencies = rewrite_imports(plugin_data_new, collection, spec, args.namespace)
  File "./migrate.py", line 237, in rewrite_imports
    mod_fst = redbaron.RedBaron(mod_src_text)
  File "/home/bcoca/work/venvs/build_collection/lib/python3.7/site-packages/redbaron/redbaron.py", line 36, in __init__
    self.node_list = base_nodes.NodeList.from_fst(baron.parse(source_code), parent=self, on_attribute="root")
  File "/home/bcoca/work/venvs/build_collection/lib/python3.7/site-packages/baron/baron.py", line 66, in parse
    return _parse(tokens, print_function)
  File "/home/bcoca/work/venvs/build_collection/lib/python3.7/site-packages/baron/baron.py", line 24, in _parse
    return parser(tokens)
  File "/home/bcoca/work/venvs/build_collection/lib/python3.7/site-packages/baron/grammator.py", line 828, in parse
    return parser.parse(iter(tokens))
  File "/home/bcoca/work/venvs/build_collection/lib/python3.7/site-packages/baron/parser.py", line 167, in parse
    raise ParsingError(debug_output)
baron.parser.ParsingError: Error, got an unexpected token SPACE here:

 103
 104     def _execute_module_with_become(self, module_name, module_args, task_vars,
 105 wrap_async, use_task):
 106         orig_become = self._play_context.become
 107         orig_become_method = self._play_context.become_method
 108         orig_become_user = self._play_context.become_user\
 109
 110 <---- here

Place in the module where this happens: https://github.com/ansible/ansible/blob/8b882be/lib/ansible/plugins/action/win_updates.py#L108-L109

I've checked that

sss = 'some str'\
# some comment
print(sss)

and

sss = 'some str'\

print(sss)

works in CPython given that there's no tokens on the next line.

And

sss = 'some str'\
print(sss)

doesn't work (expected).

[webknjaz]

Demo: PyCQA/baron#155