I wanted to create a smart-search for my R-files, including both files ending in ".r" and ".rmd". Obviously, files can't end in both.
This yields only files that satisfy both criteria
This yields no files because the criteria are mutually exclusive.
How can I search for files ending in either .r or .rmd and more generally how can I specify "or"-searches/ disjunctions? Using "or" or "||" didn't do the trick.