uncommit: add support to modify the commit message and date Currently, the evolve extension's version of this command supports it. Differential Revision: https://phab.mercurial-scm.org/D6827

run-tests: add a dedicated 'isoptional' function This is clearer than repeated manual call to to 'endswith'. (This is a gratuitous cleanup that I made while investigating a bug).

run-tests: remove the artificial indentation

run-tests: extract a `process_out_line` from the main function The main function doing line comparison is quite complex. Slicing it in smaller piece should clarify it. To avoid a huge diff, the code is kept at the same indentation. We'll re-indent in the next changesets. (This is a gratuitous cleanup that I made while investigating a bug).

run-tests: extract a `process_cmd_line` from the main function The main function doing line comparison is quite complex. Slicing it in smaller piece should clarify it. (This is a gratuitous cleanup that I made while investigating a bug).

changegroup: move message about added changes to transaction summary Before that, applying multiple changegroups in the same transaction issued the message multiple time. This result in a confusing output: adding changesets adding manifests adding file changes added 32768 changesets with 60829 changes to 2668 files adding changesets adding manifests adding file changes added 8192 changesets with 16885 changes to 1553 files adding changesets adding manifests adding file changes added 1020 changesets with 1799 changes to 536 files adding changesets adding manifests ... Instead, we now only issue the message once at the end of the transaction, summing up all added changesets, changes and files. The line is identical, but happens sightly later in the output. There are other suboptimal behavior around issue multiple changegroup (eg: progress bar). We'll cover them later. This impact of lot of test as one would expect, but a two pass check show they are just the order change we expected. To deal with "under the hood" bundle application by internal code, we had to take a slightly hacky move. We could clean that up with a more official way to enter "under the hood" section, however I want to keep this series simple to get it landed. This kind of change have a very high bit rot rate since it impact a lot of test output.

sshserver: flush stream after command dispatch I am not sure why this is not working as expected, but without this client might not see some important output. Without this patch moving some output at transaction closing time makes it disapear for ssh client in various sitaution.

narrow: rely on setting `quiet` mode instead of `pushbuffer` The `quiet` approach is what `shelve` uses and give the same result. This will help us to add less code in future changesets.

transaction: issue "new obsmarkers" message at the end of the transaction Instead of making bundle2 code responsible for this, it seems better to have it handled and the transaction level. First, it means the message will be more consistently printed. Second it means we won't spam the message over and over if the data arrive in multiple piece. Third, we are planning to move other similar message at the same level (for the same reason) so having them all at the same location will help us to control the order they are displayed.

debugobsolete: also issue the "new obsmarkers" messsage We are going to improve the way this message is issued in the core codebase. This will make it appears for `hg debugobsolete` too. Since this seems like a good idea, we make the output change in a previous changesets to clarify the next changeset.