dispatch: convert non-list option parsed by _earlygetopt() to string So we can easily compare it with the corresponding getopt() result. There's a minor behavior change. Before, "hg --cwd ''" failed with ENOENT. But with this patch, an empty cwd is silently ignored. "hg -R ''" has always worked as such, so -R has no BC.

dispatch: add option to not strip command args parsed by _earlygetopt() This allows us to parse the original args later by full-blown getopt() in order to verify the result of the faulty early parsing. Still we need the 'strip=True' behavior for shell aliases. Note that this series is RFC because it seems to change too much to be included in stable release.

dispatch: fix early parsing of short option with value like -R=foo Before, -R=foo was parsed as '-R' 'foo', which disagrees with the standard getopt behavior.

dispatch: abort if early boolean options can't be parsed Perhaps we'll need to restrict the parsing rules of --debugger and --profile, where this patch will help us know why the --debugger option doesn't work. I have another series to extend this feature to --config/--cwd/-R, but even with that, shell aliases can be used to get around the restriction.

dispatch: stop parsing of early boolean option at "--"

dispatch: extract stub function to peek boolean command option We should at least stop parsing at "--". The 'name' argument is passed for future extension.

dispatch: do not drop unpaired argument at _earlygetopt() Before, "hg log -R" just worked.

amend: update .hgsubstate before committing a memctx (issue5677) This is a minimal copy of localrepo.commit(). As the current amend() function heavily depends on the wctx API, it wasn't easy to port it to use a separate status tuple. So for now, wctx._status is updated in-place.

subrepo: extract preprocess of repo.commit() to free function No code change other than extracting a function. Maybe we should stop mutating the status argument, but that's out of the scope of stable changes.

tests: demonstrate that .hgsubstate isn't updated on amend Loosely based on test-amend.t and test-subrepo.t