It recently came to my attention that the Spring 17 Release Notes contain a typo, abbreviating Cross-Site Request Forgery to CRSF 11 times. The Release Notes page does not seem to have any sort of feedback mechanism to bing this to someone's attention? Can the typo even be fixed?
I'd suggest sending a note to https://twitter.com/salesforcedocs. But for this specific issue, I'll submit a bug to have it fixed (I work for Salesforce). Thank you very much!
The comment about entering a support case would work too. Whatever option you choose, it's appreciated.