fix possible nested comment

scripts/generate_header.sh

@@ -66,6 +66,9 @@ decl_export() {
   uncomment $1 | onelineize | export_sym
 }
 
+print_self() {
+  cat "$0" | sed -e 's#^#// #'
+}
 
 generate_header() {
   local LUA_PATH="$1"
@@ -83,10 +86,10 @@ generate_header() {
   echo "In linux, to compile this file, you'd do: 'gcc -o xxxxx.so -shared xxxxx.c'. Simple!"
   echo "Due to the way the API is structured, you *should not* link or include lua libraries."
   echo "This file was automatically generated by the below code. DO NOT MODIFY DIRECTLY."
-  echo
-  echo
-  cat "$0"
   echo "**/"
+  echo
+  print_self
+  echo
   echo "#include <stddef.h>"
 
   decl "$LUA_PATH/lua.h"
@@ -112,7 +115,10 @@ generate_api_require() {
   echo "returns a function pointer with it's corresponding name."
   echo
   echo "This file is automatically generated. DO NOT MODIFY."
-  echo "*/"
+  echo "**/"
+  echo
+  print_self
+  echo
   echo "#include <string.h>"
   echo "#include <stddef.h>"
   echo '#include "lua.h"'