config file support is ready

- over.app.ConfigFile can read, create and amend config files
- fix over.cmd.format_invocation
- add join to over.text.paragraph

test.py

@@ -30,7 +30,7 @@ def int4(*args):
 if __name__ == "__main__":
 	main = over.app.Main("new-over-test", version.str, "LICENSE", features={"config_file": True})
 	# name, description, callback, default=Option_sources.none, count=0, overwrite=True, abbr=None, in_cfg_file=True, show_in_help=True
-	main.add_option("boolean-single", "", over.callback.boolean, [False], abbr="1")
+	main.add_option("boolean-single", "ISO 8601 date for a new transfer (valid with +EHMU), defaults to current date. It's also used for relative times with --analysis-timeframe. You can use a day-count relative to today here.", over.callback.boolean, [False], abbr="1")
 	main.add_option("boolean-triple", "", over.callback.booleans, [False, False, False], abbr="3", count=3)
 	main.add_option("str-single", "", str, ["kek"], abbr="s", count=1)
 	main.add_option("str-quad", "", noop, ["ze", "kek", "is", "bek"], abbr="4", count=4)