compiler: use is_none_or where it is clearly better

heuristic was: if it easily allows removing bangs entirely? worth it.
if it requires more effort or just moves the bang? not.

compiler/rustc_resolve/src/check_unused.rs

@@ -184,11 +184,11 @@ impl<'a, 'ra, 'tcx> UnusedImportCheckVisitor<'a, 'ra, 'tcx> {
 
             // If the extern crate isn't in the extern prelude,
             // there is no way it can be written as a `use`.
-            if !self
+            if self
                 .r
                 .extern_prelude
                 .get(&extern_crate.ident)
-                .is_some_and(|entry| !entry.introduced_by_item)
+                .is_none_or(|entry| entry.introduced_by_item)
             {
                 continue;
             }

compiler/rustc_type_ir/src/search_graph/mod.rs

@@ -714,7 +714,7 @@ impl<D: Delegate<Cx = X>, X: Cx> SearchGraph<D> {
                 // current goal is already part of the same cycle. This check could be
                 // improved but seems to be good enough for now.
                 let last = self.stack.raw.last().unwrap();
-                if !last.heads.opt_lowest_cycle_head().is_some_and(|lowest| lowest <= head) {
+                if last.heads.opt_lowest_cycle_head().is_none_or(|lowest| lowest > head) {
                     continue;
                 }
             }