runtime(rmd) Update ftplugin and syntax files (#13193) Commit: https://github.com/vim/vim/commit/34745942390383ec626b168e9837d284622c7bbe Author: Jakson Alves de Aquino <jalvesaq@gmail.com> Date: Wed Sep 27 13:56:02 2023 -0300 runtime(rmd) Update ftplugin and syntax files (https://github.com/vim/vim/issues/13193) ftplugin/rmd.vim: - Set 'commentstring' dynamically according to code region. syntax/rmd.vim: - Include syntax highlighting of fenced languages dynamically. - Add conceal char for line break. Signed-off-by: Christian Brabandt <cb@256bit.org>