This is calculated in `Rope` and uses the `bromberg_sl2` homomorphic
hash function to determine the fingerprint of a single chunk and
compose each chunk fingerprint into a single fingerprint for the entire
rope that is equivalent to hashing all the rope's bytes at once.
This was probably a regression that was introduced with the new batched
`Buffer::edit` API and was caused by providing selection ranges in a
non-ordered fashion (we were passing all the starts first and then all the
ends).
With this commit we are adding a unit test to verify the behavior of
`Editor::surround_with_bracket_pair` and changing the order in which
we pass edit ranges to respect the selection order.
This new field allows blocks to specify how they want to be laid out:
- If `Fixed` they can take up all the width they want and they will impact
the scroll width of the editor. This is useful for diagnostic messages and
allows scrolling the editor further to the right to visualize the entire message.
- If `Flex` they can extend all the way to the scroll width without impacting it
any further. This is useful for the rename editor that we insert as a block
decoration when hitting `F2`.
- If `Sticky`, they will be as wide as the editor element and won't participate
in the horizontal scrolling of the editor. This is useful for headers in general,
where we want e.g. the filename and the jump button to always be visible
independently of how much the user has scrolled to the right.
* Add a `hard_tabs` setting that causes indentation to be performed
using a tab instead of multiple spaces.
* Change Buffer's indentation-related APIs to return an `IndentSize`
struct with a length and a kind, instead of just a single u32.
* Use hard tabs by default in Go.
