New file names

[hermannsorgel]

Hi, and thank you for creating such a brilliant tool.

I'm having trouble with this paragraph in the documentation:

When deft-use-filename-as-title is non-nil, the filter string will be used as the filename for new files (with the appropriate file extension appended to the end).

To get this behavior, I need to set deft-use-filter-string-for-filename to non-nil as well. When only deft-use-filename-as-title is non-nil, Deft creates files with a date in the filename but doesn't include the title in the first line.

Function deft-new-file in sources

Please let me know if a pull request to update the documentation would be helpful. I'm not entirely sure if I'm misunderstanding something, or if the documentation could be clearer.