py3: use absolute_import in test-hgweb-auth.py

py3: use print_function in test-hg-parseurl.py

py3: use absolute_import in test-hg-parseurl.py

py3: use print_function in test-filelog.py

py3: use absolute_import in test-filelog.py

py3: use print_function in test-filecache.py

py3: use absolute_import in test-filecache.py

py3: use print_function in test-duplicateoptions.py

py3: use absolute_import in test-duplicateoptions.py

py3: lexicographical order imports and print_function in test-context.py

pypy: fix overspecific test checks Those tests check a bit too specific message in ImportError/SyntaxError. Make test-hook and test-bad-extension pass on pypy

tests: lexicographical imports in silenttestrunner.py

py3: use absolute_import in test-context.py

py3: use print_function in test-bdiff.py

py3: use absolute_import in test-bdiff.py

py3: use print_function in test-batching.py

py3: use absolute_import in test-batching.py

py3: use print_function in silenttestrunner.py

py3: use absolute_import in silenttestrunner.py

py3: use print_function in hypothesishelpers.py

tests: use absolute_import in hypothesishelpers.py

py3: use print_function in get-with-headers.py

py3: use print_function in generate-working-copy-states.py

py3: use print_function in filterpyflakes.py

py3: use print_function in test-ancestor.py

py3: use print_function in seq.py

py3: use absolute_import in seq.py

parser: move parsererrordetail() function from revset module This will be used by common alias functions introduced by future patches.

hgweb: fix links in atom-branches

revset: prevent infinite recursion on pypy as explained in the commit, __len__ cannot do [x for x in self] because that can potentially call __len__ again, causing infinite recursion