Emit a newline after `@file:Suppress("DEPRECATION")`

PiperOrigin-RevId: 492585270
diff --git a/src/google/protobuf/compiler/java/file.cc b/src/google/protobuf/compiler/java/file.cc
index 6f61be8..2a381cf 100644
--- a/src/google/protobuf/compiler/java/file.cc
+++ b/src/google/protobuf/compiler/java/file.cc
@@ -697,7 +697,7 @@
       "filename", file_->name());
   printer->Print(
       "// Generated files should ignore deprecation warnings\n"
-      "@file:Suppress(\"DEPRECATION\")");
+      "@file:Suppress(\"DEPRECATION\")\n");
   if (!java_package_.empty()) {
     printer->Print(
         "package $package$;\n"
@@ -734,7 +734,7 @@
         "filename", descriptor->file()->name());
     printer.Print(
         "// Generated files should ignore deprecation warnings\n"
-        "@file:Suppress(\"DEPRECATION\")");
+        "@file:Suppress(\"DEPRECATION\")\n");
     if (!java_package_.empty()) {
       printer.Print(
           "package $package$;\n"