CSV Export creates unnecessary space in column names

Export to CSV creates wrongly formatted headers, inserting a space after commas, e.g.:

id, external_id, background, name, start, game_model_id

This causes some problems:

• modifying files with CSV-compliant editors, like OpenOffice Calc, Microsoft Excel, CSVed, etc.;
• import of data fails.

Workaround: manually fix first line of CSV files, removing unnecessary spaces, e.g the line above will be:

id,external_id,background,name,start,game_model_id

This should be a very quick but very useful fix!