warning: redundant pattern matching, consider using `is_some()`
  --> examples/rtic_spi.rs:64:23
   |
64 |             while let Some(_) = spi.read_data() {}
   |             ----------^^^^^^^------------------ help: try: `while spi.read_data().is_some()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
   = note: `#[warn(clippy::redundant_pattern_matching)]` on by default