Fix possible line-ending issues for init note
Fix possible line-ending issues for init note

By uploading a malicous note currently it is possible to prevent this
note from being edited. This happens when using Windows line endings.

With this commit we remove all `\r` characters from the notes and this
way prevent this problem.

Signed-off-by: Sheogorath <1c2647ce2ee8a4ec8e5c8b1b245ca38f94844bab@shivering-isles.com>

jackycute/HackMD,jackycute/HackMD,Yukaii/hackmd,hackmdio/hackmd,hackmdio/hackmd,Yukaii/hackmd,Yukaii/hackmd,jackycute/HackMD,hackmdio/hackmd