Check Genuine - Indentation error

[felipetdsa]

When doing
$python -m ledgerblue.checkGenuine --targetId 0x31100003

Got the error:

Traceback (most recent call last):
File "/anaconda3/lib/python3.6/runpy.py", line 183, in _run_module_as_main
mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
File "/anaconda3/lib/python3.6/runpy.py", line 153, in _get_module_details
code = loader.get_code(mod_name)
File "", line 781, in get_code
File "", line 741, in source_to_code
File "", line 219, in _call_with_frames_removed
File "/anaconda3/lib/python3.6/site-packages/ledgerblue/checkGenuine.py", line 110
return ret
^
TabError: inconsistent use of tabs and spaces in indentation

[DarthJahus]

There's a space before return ret at line 110. It should be replaced by a tab.

I'd also recommend to handle the case when given targetId doesn't finish with 2 or 3. Just in case.