diff --git a/hugr-llvm/src/extension/prelude.rs b/hugr-llvm/src/extension/prelude.rs
index 973b4721f..793621349 100644
--- a/hugr-llvm/src/extension/prelude.rs
+++ b/hugr-llvm/src/extension/prelude.rs
@@ -5,9 +5,9 @@ use hugr_core::extension::prelude::{ERROR_TYPE_NAME, STRING_TYPE_NAME};
 use hugr_core::{
     extension::{
         prelude::{
-            self, error_type,
+            self,
             array::{ArrayRepeat, ArrayScan},
-            ArrayOp, ArrayOpDef, ConstError, ConstExternalSymbol, ConstString,
+            error_type, ArrayOp, ArrayOpDef, ConstError, ConstExternalSymbol, ConstString,
             ConstUsize, MakeTuple, TupleOpDef, UnpackTuple, ARRAY_TYPE_NAME,
         },
         simple_op::MakeExtensionOp as _,
diff --git a/hugr-llvm/src/extension/prelude/array.rs b/hugr-llvm/src/extension/prelude/array.rs
index 79b028630..a2037a0f5 100644
--- a/hugr-llvm/src/extension/prelude/array.rs
+++ b/hugr-llvm/src/extension/prelude/array.rs
@@ -538,8 +538,8 @@ mod test {
         builder::{Dataflow, DataflowSubContainer, SubContainer},
         extension::{
             prelude::{
-                self, array::ArrayScan, array_type, bool_t, option_type, usize_t, ConstUsize, UnwrapBuilder as _,
-               
+                self, array::ArrayScan, array_type, bool_t, option_type, usize_t, ConstUsize,
+                UnwrapBuilder as _,
             },
             ExtensionRegistry,
         },
@@ -999,8 +999,7 @@ mod test {
         // We build a HUGR that:
         // - Creates an array [1, 2, 3, ..., size]
         // - Maps a function that increments each element by `inc`
-        // - Returns the sum of the
-
+        // - Returns the sum of the array elements
         let int_ty = int_type(6);
         let hugr = SimpleHugrConfig::new()
             .with_outs(int_ty.clone())