Feature: Allow user to modify which clipboard an anchor link is yanked to

[xinmodao]

Thank you very much for your work.
I encountered a problem while using it:
I changed the keybind of MkdnYankAnchorLink to <C - t > a
"set clipboard=unnamedplus", use the system clipboard.
Such settings can only be added to the register “. The register * and + is not updated at the same time.
Press p key to paste the register + ,
What settings can be used to specify the register