* Remove some tests we no longer need
* Delete blocks of redundant code
* Compress some tests together to simplify them
* Remove a little code for ancient linter versions
* Escape more executables we didn't escape before
* Rename a deno option that didn't match our conventions
The Rust compiler returns the first column that is _not_ part of the
current span as `column_end`, while Ale expects `end_col` to signify
the last column of the span.
* Include span label in rust lints
This turns relatively unhelpful error messages like
mismatched types
into more expressive messages along the lines of
mismatched types: expected bool, found integral variable
Fixes#597.
* Exclude rust lint span label if empty
* Use single-quoted strings in vimscript
* Add test for detailed rust errors
* Prune Cargo JSON
* Use matching error file name
* Byte offsets not char offsets
