revlog: fix bad indentation (replace tab by space)

log: speed up hg log <file|folder> This patch makes hg log <file|folder> faster by using changelog.readfiles instead of changelog.read. On our large repos for hg log <file|folder> -l5 operations that were taking: - ~8s I see a 25% improvement - ~15s, I see a 35% improvement For recently modified folder/file, the difference is negligible as we don't have to consider many revisions.

changelog: add a new method to get files modified by a changeset This patch adds a new method "readfiles" to get the files modified by a changeset. It extracts some logic from "read" to only return the files modified by a changeset as efficiently as possible. This is used in the next patch to speed up hg log <file|folder>

tests: convert directory separators to '/' for MSYS in test-check-py-compat This is the same fix as 8c1d7a0e737b.

tests: make `pwd` URL compatible on Windows in test-default-push Without this, the test fails with: $ hg -q commit -A -m 'add pushurl' abort: file:// URLs can only refer to localhost $ hg push abort: file:// URLs can only refer to localhost The variable $PWD causes check-code to complain, so avoid that.

windows: correct the import of win32 This module is relative, and was overlooked when converting to absolute_import in 6daa795ed32f.

win32: add internals help topics to Inno Setup installer

changegroups: add documentation for cg3

changegroup: add flags field to cg3 delta header This lets revlog flags be transmitted over the wire. Right now this is useful for censored nodes and for narrowhg's ellipsis nodes.

changegroup: introduce cg3, which has support for exchanging treemanifests I'm not entirely happy with using a trailing / on a "file" entry for transferring a treemanifest. We've discussed putting some flags on each file header[0], but I'm unconvinced that's actually any better: if we were going to add another feature to the cg format we'd still be doing a version bump anyway to cg4, so I'm inclined to not spend time coming up with a more sophisticated format until we actually know what the next feature we want to stuff in a changegroup will be. Test changes outside test-treemanifest.t are only due to the new CG3 bundlecap showing up in the wire protocol. Many thanks to adgar@google.com and martinvonz@google.com for helping me with various odd corners of the changegroup and treemanifest API. 0: It's not hard refactoring, nor is it a lot of work. I'm just disinclined to do speculative work when it's not clear what the customer would actually be.