bisect: use standard one-line commit summary This makes bisect use the standardized support for one-line commit summary I added a while back. That means that it will respect the `command-templates.oneline-summary` config. If also means that the default output now includes the first line of the commit message (see test impact). Differential Revision: https://phab.mercurial-scm.org/D10245

# See http://EditorConfig.org for the specification

root = true

[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
end_of_line = lf

[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
end_of_line = lf

[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false
end_of_line = lf