Fix clippy after upstream merge (art style test, Fenwick step, pencil bool)

Co-authored-by: nrq6993-a11y <nrq6993-a11y@users.noreply.github.com>

crates/eps/src/import/ai/style.rs

@@ -827,8 +827,7 @@ mod tests {
 
     #[test]
     fn hostile_stroke_paint_flags_ignore_short_operands() {
-        let mut f = Filter::default();
-        f.paints = (true, true);
+        let mut f = Filter { paints: (true, true), ..Filter::default() };
         paint_op(&mut f, "Xd", &[V::Num(1.0)]);
         assert_eq!(f.paints, (true, true));
         paint_op(&mut f, "Xd", &[V::Num(0.0), V::Num(1.0)]);

crates/pathops/src/budget.rs

@@ -15,14 +15,18 @@ pub const MAX_SEGMENT_PAIRS: usize = 1 << 22;
 /// Fenwick tree of counts over its slots.
 struct Counts(Vec<isize>);
 
-// `isolate_lowest_one` is still unstable in Rust 1.96, and the workspace builds on 1.95 (rust-version).
-#[allow(clippy::manual_isolate_lowest_one)]
+#[inline]
+fn fenwick_step(i: usize) -> usize {
+    // Same as `i.isolate_lowest_one()`; that API is still unstable on the workspace MSRV.
+    1 << i.trailing_zeros()
+}
+
 impl Counts {
     fn add(&mut self, slot: usize, d: isize) {
         let mut i = slot + 1;
         while let Some(c) = self.0.get_mut(i) {
             *c += d;
-            i += i & i.wrapping_neg();
+            i += fenwick_step(i);
         }
     }
 
@@ -31,7 +35,7 @@ impl Counts {
         let (mut i, mut s) = (end.min(self.0.len().saturating_sub(1)), 0);
         while i > 0 {
             s += self.0.get(i).copied().unwrap_or(0);
-            i -= i & i.wrapping_neg();
+            i -= fenwick_step(i);
         }
         s
     }