bookmarks: avoid creating a nested repository during testing This helps the test to pass with hgwatchman, which would otherwise need to be taught about a nested .hg directory. hgwatchman already blacklists test-nested-repo.t which covers the actual usecase

dispatch: strip command line options like config file options Currently, whitespace in command line --config options are considered significant while whitespace in config files are not considered significant. This diff strips the leading and trailing whitespace from command line config options.

hook: for python hook ImportErrors, add note to run with --traceback I personally found it completely non-obvious that --traceback prints out stack traces for failed imports.