build: fix hgrc manpage building with docutils 0.9 Since docutils 0.9, `roman` module has been moved from module directory root (i.e. `site-packages/roman.py`) to `docutils.utils` module. Therefore `import roman` statement should be wrapped in `try: ... except ImportError: ...` block to handle importing correctly.

context: fix call to util.safehasattr

alias: inherit command optionalrepo flag (issue3298) Commands working without a repository, like "init", are listed in commands.norepo. Commands optionally using a repository, like "showconfig", are listed in commands.optionalrepo. Command aliases were inheriting the former but not the latter.

tests: improve test of hg-ssh and make the test pass on windows

hg-ssh: exit with 255 instead of -1 on error Unix sh would cast -1 to 255 anyway, but on windows -1 become 0. Better be explicit with the 255 everywhere.

hg-ssh: use %s for printing paths in error messages This avoids \\ if this ever is run on windows - for example in the test suite.