perl5215delta.pod: typo
perl5220delta: Function::Parameters update

F:P has had an update, but now it fails due to the METHOP type
introduced in 5.21.5.

Patch at https://rt.cpan.org/Ticket/Display.html?id=100518
Fix UTF8 lex sub names

UTF8 lexical sub names were getting mangled, with extra junk on the end,
due to a precedence problem.