cargo fmt and clippy across the panorama work, and one lint master carried

The dr-face comparison is master's: a negated partial-order test on the
eye box's width, rewritten as the two conditions it meant.

core/dr-pano/src/matching.rs

@@ -16,7 +16,7 @@
 
 use crate::features::{Features, DESCRIPTOR_LEN};
 
-const _: () = assert!(DESCRIPTOR_LEN % 8 == 0);
+const _: () = assert!(DESCRIPTOR_LEN.is_multiple_of(8));
 
 /// A correspondence: keypoint `a` in the first image matches keypoint `b`
 /// in the second, with the cosine similarity of their descriptors.
@@ -64,9 +64,10 @@ pub fn match_features(a: &Features, b: &Features, min_similarity: f32) -> Vec<Ma
     let best_ab: Vec<(usize, f32)> = sim
         .chunks_exact(nb)
         .map(|row| {
-            row.iter()
-                .enumerate()
-                .fold((0usize, f32::MIN), |acc, (j, &s)| if s > acc.1 { (j, s) } else { acc })
+            row.iter().enumerate().fold(
+                (0usize, f32::MIN),
+                |acc, (j, &s)| if s > acc.1 { (j, s) } else { acc },
+            )
         })
         .collect();
     let mut best_ba = vec![(0usize, f32::MIN); nb];