fix missing newline on gend files

Author: ysawa0

.pre-commit-config.yaml

@@ -18,6 +18,7 @@ repos:
       - id: check-symlinks # Detects broken symlinks.
       - id: trailing-whitespace # Removes any trailing whitespace at the end of lines.
       - id: end-of-file-fixer # Ensures files end with a single newline or are empty.
+        exclude: templates/
 
   #############################################################################
   # JSON, TOML