with_flair object from either a code chunk or a
string object containing source code.R/decorate.R
    decorate.Rddecorate does its best to guess if it has been given a code string or
a chunk name, based on the presence of special characters.
decorate(x, ...)
| x | A string, containing either a chunk label or R code.  | 
    
|---|---|
| ... | Chunk options to pass along  | 
    
A with_flair object.