* lib/strings: optimise hasInfix function * lib/strings: optimise hasInfix further using regex * rstudio: call hasInfix with a string * lib/strings: remove let from hasInfix Co-authored-by: pennae <82953136+pennae@users.noreply.github.com> Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>