verify: use some intermediate variables instead of a multi-liner
This is shorter and easier to read as the indentation remains the same.
Differential Revision: https://phab.mercurial-scm.org/D10818
== New Features ==
* `hg config` now has a `--source` option to show where each
configuration value comes from.
== Default Format Change ==
These changes affects newly created repositories (or new clone) done with
Mercurial 5.8.
== New Experimental Features ==
== Bug Fixes ==
== Backwards Compatibility Changes ==
== Internal API Changes ==