[Minor] Further improve patterns

diff --git a/lualib/lua_magic/patterns.lua b/lualib/lua_magic/patterns.lua
index f741900ce1bfd4be6cab25a8ec3dfda7f0ba7bcc..a19aba03cae167a03d437f2f69c75f7c0514b191 100644 (file)
--- a/lualib/lua_magic/patterns.lua
+++ b/lualib/lua_magic/patterns.lua
@@ -26,13 +26,13 @@ local patterns = {
     -- These are alternatives
     matches = {
       {
-        string = [[^%PDF-\d]],
+        string = [[%PDF-[12]\.\d]],
         position = {'<=', 1024},
         weight = 60,
         heuristic = heuristics.pdf_format_heuristic
       },
       {
-        string = [[^%FDF-\d]],
+        string = [[%FDF-[12]\.\d]],
         position = {'<=', 1024},
         weight = 60,
         heuristic = heuristics.pdf_format_heuristic