tests: use NO_CHECK_EOF for fragments used to test importing via extension test-extension.t is excluded in test-check-module-imports.t, because import-checker.py reports that some python code fragments in it does not import modules in recommended style. These code fragments are used to test importing modules relatively and absolutely via extension (e.g. issue4029, issue5208, and so on). Test specific package hierarchy becomes complicated for this purpose, and it seems reasonable to avoid checking these code fragments with import-checker.py. But on the other hand, other code fragments in test-extension.t should be checked by import-checker.py. Therefore, this patch uses NO_CHECK_EOF limit mark only for python code fragments, which are used to test importing via extension in test-extension.t. NO_CHECK_EOF limit mark tells import-checker.py that this code fragment should be ignored, via testparseutil.py.

tests: use NO_CHECK_EOF for fragments having intentional error Some test scripts are excluded in test-check-module-imports.t, because import-checker.py reports that code fragments embedded in these test scripts have syntax error. But these syntax error is intentional. This patch uses NO_CHECK_EOF instead of EOF as heredoc limit mark for such fragments, in order to make import-checker.py ignore them. NO_CHECK_EOF limit mark tells import-checker.py that this code fragment should be ignored, via testparseutil.py.

tests: fix style issue of importing order in test-lock.py test-lock.py is excluded in test-check-module-imports.t, because import-checker.py reports that some stdlibs are imported after local silenttestrunner module. I can not found out any reason why tests/silenttestrunner.py should be imported before some stdlibs from the point of functionality view.

tests: fix style issue of importing hgweb in embedded code fragments Some test scripts are excluded in test-check-module-imports.t, because import-checker.py reports that hgweb and/or hgwebdir of mercurial.hgweb are not imported in recommended style. To fix this issues, this patch make python code fragments embedded in these files import hgweb from mercurial package at first, and refer hgweb and hgwebdir via imported hgweb.

py3: encode str to bytes These fields are str on Python 2 and 3. This module doesn't import any Mercurial modules. So I just did the str -> bytes inline. Differential Revision: https://phab.mercurial-scm.org/D5010

py3: sprinkle statprof.py with utf-8 encoding Trying to chase the long tail of unicode badness in this file due to frame / code objects holding str everywhere. Differential Revision: https://phab.mercurial-scm.org/D5016