debugstate: Always call dirstatemap.debug_iter()
… passing it a new `all` argument for the `--all` CLI option,
instead of conditionally calling `.debug_iter()` or `.items()`
This prepares for the next commit.
Differential Revision: https://phab.mercurial-scm.org/D11462
edition = "2018"
max_width = 79
wrap_comments = true
error_on_line_overflow = true