compare-disco: move case parsing into its own function This is open the way to the next changeset that will allow to specify a list of heads.

compare-disco: add an option to skip the case If we already know the context, we can save a lot of display space by skipping the case. This also open the way to speedup to the way we specify the subsets. (the code is hacky, but this is a quicky and dirty debug script)

compare-disco: display a header by default This help us to understand the output. (the code is hacky, but this is a quicky and dirty debug script)

compare-disco: prepare for primitive argument parsing We need to be able to configure a couple of things, so lets prepare the code for it. (the code is hacky, but this is a quicky and dirty debug script)

tests: improve portability by no longer using the flag [tar --force-local] A different way of making sure the path is not interpreted as a URL is to never give this path to [tar], instead making tar read from stdin.

phase-shelve: correct unicode string to honor 'shelve.store=internal' In the case of strip-based shelves, there should be no hidden commit found. That's because shelve.store=internal is necessary but not sufficient to enable phase-based shelves; internal-phase must also be set.

status: include `repo` in template context also for resolved paths The `repo` object needs to be in the templater context when using e.g. `relpath`. It has been missing there since it was the unresolved files were added to the templated output in 07ebb567e8bb.

shelve: remove strip and rely on prior state (issue6735)

shelve: in test for trailing whitespace, strip commit (issue6735)

shelve: demonstrate that the state is different across platforms (issue6735)