Error in reduced schedule CSV file

[dt-woods]

In the read_eia923_fuel_receipts method in coal_upstream.py, Page 5 of the EIA923 Excel workbook is saved to CSV. The header columns include a new line character "\n" for the following coal min columns:

• Coalmine\nType
• Coalmine\nState
• Coalmine\nCounty
• Coalmine\nMsha Id

When written to CSV, these headers are all truncated to "Coalmine," dropping the context after the newline. This results in a CSV file with four columns all of the same name and causes errors with merging.

https://github.com/USEPA/ElectricityLCI/blob/e56268132f7607ead58a33bb5bdd525563a784f5/electricitylci/coal_upstream.py#L90

To fix, consider running the data frame through the _clean_columns method before writing to CSV.