Use immutable tuple instead of mutable list

Signed-off-by: Johan Stokking <[email protected]>

Author: johanstokking

tools/export/exporters.py

@@ -61,8 +61,10 @@ def __init__(self, target, export_dir, project_name, toolchain,
         self.jinja_environment = Environment(loader=jinja_loader)
         self.resources = resources
         self.generated_files = []
-        self.static_files = [join(self.TEMPLATE_DIR, "GettingStarted.html"),
-                             join(self.TEMPLATE_DIR, ".mbed")]
+        self.static_files = (
+            join(self.TEMPLATE_DIR, "GettingStarted.html"),
+            join(self.TEMPLATE_DIR, ".mbed"),
+        )
         self.builder_files_dict = {}
         self.add_config()