diff: move diffline to patch module diffline is not part of diff computation, so it makes more sense to place it with other header generation in patch module. In upcoming patches we will generalize this approach for all headers added in the patch, including the git index header.

diff: unify calls to diffline diffline was called from trydiff for binary diffs and from unidiff for text diffs. In this patch we unify those calls into one. diffline is also a header, not part of diff mechanisms, so it makes sense to remove that responsibility from the mdiff module. In upcoming patches we will move diffline to patch module and keep grouping responsibilities.

diff: move b85diff to mdiff module b85diff generates a binary diff, so we move this code to mdiff module along with unidiff for text diffs. All diffing mechanisms will be in the same place. In an upcoming patch we will remove the responsibility to print the index header from b85diff and move it back to patch, since it's a patch metadata header, not part of the diff generation.

share: always set default path to work with subrepos (issue3518) set the default path in any case because creating subrepo looks this up. Subrepos are cloned, not shared.

vfs: optimize __call__ by not calling util.split for reads dirname and basename are not used on reads

run-tests: backout 4a4173519b63 This deleted work in progress to eliminate child processes for -j.

test-pathencode: make a 2.4-safe import of collections

tests: add a randomized test for pathencode This is a probabilistic test - it generates different test cases on every run, unless invoked from the command line with a specific seed. The default number of tests run should make the tests take about a second to complete on a semi-modern laptop.

webcommands: allow hgweb's archive to recurse into subrepos Currently when obtaining an archive snapshot of a repository via the web interface, subrepositories are not taken in the snapshot. I introduce an option, archivesubrepos, which allows this.

Merge with crew-stable.