setup: add missing newline in warning

setup: read .hg_archival.txt for version info (issue1670) Previously, setup.py was enhanced to identify the Mercurial version from either .hg/ or mercurial/__version__.py. When archives are created using 'hg archive' or via hgweb, neither of those options are available. However, there is a .hg_archival.txt file in the root of the archive that has the information. This patch enhances setup.py to identify the Mercurial version from the .hg_archival.txt file when there is no .hg/ or mercurial/__version__.py available.

setup.py: subprocess instead of os.popen, sys.stderr.write instead of print Also check that .hg is a directory.

gendoc: add missing space in command synopsis

merge: give hint as to how to discover uncommitted changes Many users will try 'hg diff' here, and it will not show them missing files.

commands: standardize parents command meta data

i18n-da: synchronized

i18n: accurately generate hg.pot

hgcia, convert: escape backslashes in docstrings

commands: remove unnecessary quotes in backout help

test-merge-tools: windows fixes - /bin/cat does not exist, expect 'cat' - non-interactive mode is not correctly detected in pysh, force it

ui: honor interactive=off even if isatty()