memctx: create parent contexts using "repo[p]" syntax
I want to reduce dependence on basectx.__new__() and move that code
over to repo.__getitem__().
Differential Revision: https://phab.mercurial-scm.org/D2968
# 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