run-tests: remove check on --shell argument No shell is needed when executing Python tests and finding a good shell might be difficult/impossible on some platforms (e.g., Windows).

subrepo: create subrepos using clone instead of pull Subrepositories used to be created empty and then filled with data using pull. This is wasteful when you do a clone from a local source since it means that no hardlinks are created for the subrepos. This patch make the hgsubrepo._get method check for an empty subrepo and in that case do a clone instead of a pull. This brings in the same data as before, but creates hardlinks when possible.

progress: add speed format This is not enabled by default, but the user can add it by setting progress.format. We might want to let the estimate format output a speed instead of an ETA if there is not total. Currently estimate just returns the empty string in that case.