.editorconfig

context: make sure __str__ works, also when there is no _changectx

Before, it could crash when trying to print the wrong kind of object at the
wrong time.

# 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