Update collapse ring headers
diff --git a/ip/randsack/rtl/collapsering.v b/ip/randsack/rtl/collapsering.v
index 2de645f..04ce4c9 100644
--- a/ip/randsack/rtl/collapsering.v
+++ b/ip/randsack/rtl/collapsering.v
@@ -1,4 +1,7 @@
-// SPDX-FileCopyrightText: 2021 Harrison Pham
+// Trimmable collapsing ring oscillator for TRNG.
+//
+// SPDX-FileCopyrightText: (c) 2021 Harrison Pham <harrison@harrisonpham.com>
+// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
@@ -11,7 +14,6 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
-// SPDX-License-Identifier: Apache-2.0
module collapsering (
output wire CLKBUFOUT,
diff --git a/ip/randsack/rtl/collapsering_macro.v b/ip/randsack/rtl/collapsering_macro.v
index d40bf17..6da1ce4 100644
--- a/ip/randsack/rtl/collapsering_macro.v
+++ b/ip/randsack/rtl/collapsering_macro.v
@@ -37,4 +37,4 @@
.CLKMUX(clkmux)
);
-endmodule // collapsering_macro
+endmodule // module collapsering_macro
