Use .ini filename extension for config.

diceware/config.py

@@ -42,7 +42,7 @@ def valid_locations():
     user_home = os.path.expanduser("~")
     result = []
     if user_home != "~":
-        result = [os.path.join(user_home, ".diceware"), ]
+        result = [os.path.join(user_home, ".diceware.ini"), ]
     return result
 
 

tests/test_config.py

@@ -14,5 +14,5 @@ class TestConfigModule(object):
         new_home.ensure_dir()
         monkeypatch.setenv("HOME", str(new_home))
         assert valid_locations() == [
-            str(new_home / ".diceware")
+            str(new_home / ".diceware.ini")
             ]