ignore backup file

a9007eac · 赵鹏翀 · a3540394 · a9007eac · a3540394
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 *.bak
 *.o
 *.exe
+*.backup
--- a/lex.backup
+++ b/lex.backup
-Compressed tables always back up.