showstack: add an extension docstring Now, running `hg help showstack` will give details on how to use the extension.

bookmark: run 'pushkey' hooks after bookmark move, not 'prepushkey' This was a silly copy paste mistake. Spotted by Mitchell Plamann from Jane Street.

hgweb: remove unused second argument of nextPageVarGet() nextPageVarGet is a function that's used in ajaxScrollInit() to produce URL of the next page. Before f84b01257e06, its second argument previousVal was a number on /graph pages, and the code was simply adding 60 to it and returning the resulting value. Now previousVal can only be a string containing changeset hash, which can't be used the same way (and in fact isn't used in any way).

dispatch: handle IOError when writing to stderr Previously, attempts to write to stderr in dispatch.run() may lead to an exception being thrown. This would likely be handled by Python's default exception handler, which would print the exception and exit 1. Code in this function is already catching IOError for stdout failures and converting to exit code 255 (-1 & 255 == 255). Why we weren't doing the same for stderr for the sake of consistency, I don't know. I do know that chg and hg diverged in behavior here (as the changed test-basic.t shows). After this commit, we catch I/O failure on stderr and change the exit code to 255. chg and hg now behave consistently. As a bonus, Rust hg also now passes this test. I'm skeptical at changing the exit code due to failures this late in the process. I think we should consider preserving the current exit code - assuming it is non-0. And, we may want to preserve the exit code completely if the I/O error is EPIPE (and potentially other special error classes). There's definitely room to tweak behavior. But for now, let's at least prevent the uncaught exception. Differential Revision: https://phab.mercurial-scm.org/D1860

commandserver: restore cwd in case of exception The order of the statements was also changed a bit. But it shouldn't matter. Differential Revision: https://phab.mercurial-scm.org/D1859

tests: make hg frame optional When `hg` is a Rust binary, the `hg` frame doesn't exist because an `hg` Python script doesn't exist. This commit updates expected test output to make the `hg` frame optional. There /might/ be a way to do this more accurately with the "(feature !)" syntax in .t files. However, I poked at it for a few minutes and couldn't get it to work. Worst case with using (?) is we drop the frame from output for Python `hg`. The `hg` frame isn't terribly important. So the worst case doesn't feel that bad. If someone wants to enlighten me on how to use "(feature !)" for optional output based on hghave features, I'd be more than willing to update this. Differential Revision: https://phab.mercurial-scm.org/D1858

test-lfs: add tests to show that hashes remain unchanged by conversions This is a very cool feature that we should document, but I'll punt that to the freeze. From what I can tell, git doesn't have this capability.