Use old formatting to keep it compatible with Python 3.5 (#304)

Author: mxamin

tests/softhsm_setup.py

@@ -123,20 +123,24 @@ def setup() -> None:
             if softhsm_version == 2:
                 softhsm_db = _temp_dir()
                 f.write(
-                    f"""
+                    """
 # Generated by test
-directories.tokendir = {softhsm_db}
+directories.tokendir = {}
 objectstore.backend = file
 log.level = DEBUG
-"""
+""".format(
+                        softhsm_db
+                    )
                 )
             else:
                 softhsm_db = _temp_file()
                 f.write(
-                    f"""
+                    """
 # Generated by test
-0:{softhsm_db}
-"""
+0:{}
+""".format(
+                        softhsm_db
+                    )
                 )
 
         logging.debug('Initializing the token')
@@ -223,7 +227,7 @@ def setup() -> None:
                         '[pkcs11_section]',
                         'engine_id = pkcs11',
                         # dynamic_path,
-                        f"MODULE_PATH = {component_path['P11_MODULE']}",
+                        "MODULE_PATH = {}".format(component_path['P11_MODULE']),
                         'init = 0',
                     ]
                 )