rust-cpython: fix unsafe inner(py).borrow_mut() calls
Since self.inner is managed by PySharedState, it must not be borrowed
mutably through the RefCell interface. Otherwise, the underlying object
could be mutated while a reference is leaked to Python world.
# 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
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false