Fix typos and grammar in documentation comments (#6834)

crates/cairo-lang-lowering/src/lower/refs.rs

@@ -25,9 +25,9 @@ pub struct ClosureInfo {
 pub struct SemanticLoweringMapping {
     /// Maps member paths ([MemberPath]) to lowered variable ids or scattered variable ids.
     scattered: OrderedHashMap<MemberPath, Value>,
-    /// Maps captured member paths to a clusure that captured them.
+    /// Maps captured member paths to a closure that captured them.
     pub captured: UnorderedHashMap<MemberPath, VariableId>,
-    /// Maps captured member paths which are copiable to a clusure that captured them.
+    /// Maps captured member paths which are copiable to a closure that captured them.
     pub copiable_captured: UnorderedHashMap<MemberPath, VariableId>,
     /// Maps the variable id of a closure to the closure info.
     pub closures: UnorderedHashMap<VariableId, ClosureInfo>,

crates/cairo-lang-lowering/src/optimizations/cancel_ops.rs

@@ -38,7 +38,7 @@ pub fn cancel_ops(lowered: &mut FlatLowered) {
     let CancelOpsContext { mut var_remapper, stmts_to_remove, .. } = analysis.analyzer;
 
     // Remove no-longer needed statements.
-    // Note that dedup() is used since a statement might be marked for removal more then once.
+    // Note that dedup() is used since a statement might be marked for removal more than once.
     for (block_id, stmt_id) in stmts_to_remove
         .into_iter()
         .sorted_by_key(|(block_id, stmt_id)| (block_id.0, *stmt_id))

crates/cairo-lang-lowering/src/optimizations/match_optimizer.rs

@@ -242,7 +242,7 @@ pub struct FixInfo {
 
 #[derive(Clone)]
 struct OptimizationCandidate<'a> {
-    /// The variable that is match.
+    /// The variable that is matched.
     match_variable: VariableId,
 
     /// The match arms of the extern match that we are optimizing.