Update methods.py

Author: joelriendeau

methods.py

@@ -993,7 +993,7 @@ def glob_recursive_2(pattern, dirs, node="."):
     def glob_current_and_custom(pattern, dirs):
         paths = ["."]
         if env["custom_modules"]:
-            paths += env["custom_modules"].split(",")
+            paths = paths + env["custom_modules"].split(",")
         results = []
         for p in paths:
             results = results + glob_recursive_2(pattern, dirs, p)