This reverts commit 3ffa099f553cee70045fefbd8303743f72ddc0cc.
Apparently, this was buggy, I'm sorry. With this patch, serializing calenders was a bit over ambitious with escaping, leading to escaped RRULEs where they shouldn't be.
I've added a test that showcases this behavior and reverted the commit.
This reverts commit 3ffa099f553cee70045fefbd8303743f72ddc0cc.
Apparently, this was buggy, I'm sorry. With this patch, serializing calenders was a bit over ambitious with escaping, leading to escaped RRULEs where they shouldn't be.
I've added a test that showcases this behavior and reverted the commit.