tests: use `hg help dates` instead of `hg help revs` in test
The revisions help is already long and will get longer, so switch to
another short and stable topic.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true