diff --git a/src/libdredd/src/mutation_replace_expr.cc b/src/libdredd/src/mutation_replace_expr.cc
index 372fcef3..66f86b7b 100644
--- a/src/libdredd/src/mutation_replace_expr.cc
+++ b/src/libdredd/src/mutation_replace_expr.cc
@@ -583,10 +583,10 @@ void MutationReplaceExpr::ReplaceExprWithFunctionCall(
   // but not for non-constants. This is catered for by inserting an explicit
   // cast.
   auto parents = ast_context.getParents<clang::Expr>(*expr_);
-  // This the expression occurs in an initializer list and is subject to an
-  // explicit cast then it will have at least two parents -- the initializer
-  // list, and the implicit cast. (This is probably due to implicit casts being
-  // treated as invisible nodes in the AST.)
+  // The expression that occurs in an initializer list and is then subject to an
+  // explicit cast will have at least two parents: the initializer list and the
+  // implicit cast. (This is probably due to implicit casts being treated as
+  // invisible nodes in the AST.)
   if (ast_context.getLangOpts().CPlusPlus && parents.size() >= 2 &&
       parents[0].get<clang::InitListExpr>() != nullptr &&
       parents[1].get<clang::ImplicitCastExpr>() != nullptr) {
diff --git a/test/single_file/initializer_list_narrower_nested.cc b/test/single_file/initializer_list_narrower_nested.cc
index 45359560..ddfe457d 100644
--- a/test/single_file/initializer_list_narrower_nested.cc
+++ b/test/single_file/initializer_list_narrower_nested.cc
@@ -5,4 +5,4 @@ struct foo {
 
 void baz() {
   foo bar[] = {{1, 2}};
-}
\ No newline at end of file
+}
diff --git a/test/single_file/initializer_list_narrower_nested.cc.expected b/test/single_file/initializer_list_narrower_nested.cc.expected
index b2f8b1e5..66822c30 100644
--- a/test/single_file/initializer_list_narrower_nested.cc.expected
+++ b/test/single_file/initializer_list_narrower_nested.cc.expected
@@ -67,4 +67,4 @@ struct foo {
 
 void baz() {
   foo bar[] = {{static_cast<short>(__dredd_replace_expr_int_one(1, 0)), static_cast<short>(__dredd_replace_expr_int_constant(2, 3))}};
-}
\ No newline at end of file
+}
diff --git a/test/single_file/initializer_list_narrower_nested.cc.noopt.expected b/test/single_file/initializer_list_narrower_nested.cc.noopt.expected
index b7350328..9b16f481 100644
--- a/test/single_file/initializer_list_narrower_nested.cc.noopt.expected
+++ b/test/single_file/initializer_list_narrower_nested.cc.noopt.expected
@@ -60,4 +60,4 @@ struct foo {
 
 void baz() {
   foo bar[] = {{static_cast<short>(__dredd_replace_expr_int(1, 0)), static_cast<short>(__dredd_replace_expr_int(2, 6))}};
-}
\ No newline at end of file
+}