help: hide phaseidx template keyword
I don't think it's great idea to expose the internal representation of phases.
Let's discourage use of the phaseidx keyword.
# 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