For use in asis
blocks only.
markdownLink(text, url, title = NULL)
text 


url 

title 

Markdownformatted link.
Updated 20190805.
markdownLink( text = "R", url = "https://www.rproject.org", title = "The R Project for Statistical Computing" )#> [R](https://www.rproject.org): The R Project for Statistical Computing