histedit: don't cleanup nodes already disposed of
If something else took care of these temporary nodes, we don't need to do
anything about it. This less liberal usage of pruning through cleanup nodes
will help us further cleanup on the road to explicitly tracks folds.
# 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