Combine default type arguments and `run` commands

[Example use case](https://github.com/vncsmyrnk/shell-utils/commit/58665b9da487364ca0cdcbd2745b3186bc7b784c#diff-4cf9e94028fdd4662eced131e5545fa67ad3153f8c0b7a56dc4a98b4f37a2e34)