Fix "control characters" in Obsidian

[ogregoire]

In Obsidian, a few files showed red dots and had the tooltip "control character 0xad", such as the Spells H.md file in the "Hellish Rebuke" section. Only some spell files have this peculiarity.

I searched for all the "control characters" and removed them. This command helped me find them:

find Documents -type f -exec grep --binary -P "[\x80-\xff]" {} + | grep -v "[×½]"

[ogregoire]

Obsolete given the new structure.