XCOM doesn't understand scientific notation

[cosama]

If one provides mixtures with scientific notation for the fractional content, xcom seems to not be processing it correctly and becquerel throws an error:

bq.tools.fetch_xcom_data(['N 7.8e-1', 'O2 2.2e-1'], e_range_kev=[1, 10000])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "becquerel/becquerel/tools/xcom.py", line 450, in fetch_xcom_data
    query = _XCOMQuery(arg, **kwargs)
  File "becquerel/becquerel/tools/xcom.py", line 175, in __init__
    self.perform()
  File "becquerel/becquerel/tools/xcom.py", line 413, in perform
    self._parse_text()
  File "becquerel/becquerel/tools/xcom.py", line 379, in _parse_text
    tables = pd.read_html(self._text, header=0, skiprows=[1, 2])
  File "/usr/lib64/python3.6/site-packages/pandas/io/html.py", line 906, in read_html
    keep_default_na=keep_default_na)
  File "/usr/lib64/python3.6/site-packages/pandas/io/html.py", line 743, in _parse
    raise_with_traceback(retained)
  File "/usr/lib64/python3.6/site-packages/pandas/compat/__init__.py", line 344, in raise_with_traceback
    raise exc.with_traceback(traceback)
ValueError: No tables found

I don't think it is worth fixing this, or even our job, but I put this here for further reference