[tools][gen] Describe how to regenerate files in the header
Change-Id: I9b0b9e4ecad25122b4b046c1283333aee48ee246
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/147801
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
diff --git a/test/tint/builtins/gen/var/distance/aa4055.wgsl b/test/tint/builtins/gen/var/distance/aa4055.wgsl
index ea09bbb..b7d1fc5 100644
--- a/test/tint/builtins/gen/var/distance/aa4055.wgsl
+++ b/test/tint/builtins/gen/var/distance/aa4055.wgsl
@@ -13,11 +13,12 @@
// limitations under the License.
////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
// test/tint/builtins/gen/gen.wgsl.tmpl
//
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+// Do not modify this file directly
////////////////////////////////////////////////////////////////////////////////