Clippy fixes

Author: garethj2

src/haystack/defs/namespace.rs

@@ -429,7 +429,7 @@ impl Namespace {
                         Value::Symbol(sym) => self.get(sym),
                         _ => None,
                     })
-                    .filter(|target| inheritance.map_or(false, |s| s.contains(target.def_symbol())))
+                    .filter(|target| inheritance.is_some_and(|s| s.contains(target.def_symbol())))
                     .for_each(|_| {
                         matches.insert(def);
                     });
@@ -569,7 +569,7 @@ impl Namespace {
     pub fn fits(&self, def: &Symbol, base_def: &Symbol) -> bool {
         self.inheritance_map
             .get(def)
-            .map_or(false, |s| s.contains(base_def))
+            .is_some_and(|s| s.contains(base_def))
     }
 
     /// Return true if the specified def is a marker.