Fix tabular renderer ext matching error

If a file with an extension that had casing that was not all lowercase was passed to the tabular renderer, it would not match it with the proper function.

Author: AddisonSchiller

mfr/extensions/tabular/render.py

@@ -63,7 +63,7 @@ def _populate_data(self, fp, ext):
  :param ext: file extension
  :return: tuple of column headers and row data
  """
- function_preference = settings.LIBS.get(ext)
+ function_preference = settings.LIBS.get(ext.lower())
 
  for function in function_preference:
  try: