Fix #1870 - Strip control characters out of strings in AtomSerializer (#1876)
Fix #1870 - Strip control characters out of strings in AtomSerializer (#1876)

* Fix #1870 - Strip control characters out of strings in AtomSerializer

* Adjust according to comment by @alpaca-tc

kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon