How To: File names only lower case and avoid spaces?

[aisbergde]

By default, the title of the page being saved is used as the filename. Spaces and upper and lower case letters are also preserved.

When saving to a git repository, it would be nice to be able to clean up the filename a bit at the push of a button (or via settings):

• convert all into lowercase
• replace spaces with '-' or '_'.

When saving to GitHub, it's not clear how to specify a subfolder as the default destination or what the settings mean. There is a setting for "Save Path". But it says as a note: "Only takes effect when saving to code". And I do not understand the meaning. What is meant by "saving to code"?