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.