### 3.8.0 / 2018-08-04
[Full Changelog](http://github.com/rspec/rspec-core/compare/v3.7.1...v3.8.0)
Enhancements:
* Improve shell escaping used by `RSpec::Core::RakeTask` and `--bisect` so
that it works on `Pathname` objects. (Andrew Vit, #2479)
* Nicely format errors encountered while loading files specified
by `--require` option. (Myron Marston, #2504)
* Significantly improve the performance of `--bisect` on platforms that
support forking by replacing the shell-based runner with one that uses
forking so that RSpec and the application environment can be booted only
once, instead of once per spec run. (Myron Marston, #2511)
* Provide a configuration API to pick which bisect runner is used for
`--bisect`. Pick a runner via `config.bisect_runner = :shell` or
`config.bisect_runner = :fork` in a file loaded by a `--require`
option passed at the command line or set in `.rspec`. (Myron Marston, #2511)
* Support the [XDG Base Directory
Specification](https://specifications.freedesktop.org/basedir-spec/latest/)
for the global options file. `~/.rspec` is still supported when no
options file is found in `$XDG_CONFIG_HOME/rspec/options` (Magnus Bergmark, #2538)
* Extract `RSpec.world.prepare_example_filtering` that sets up the
example filtering for custom RSpec runners. (Oleg Pudeyev, #2552)
Bug Fixes:
* Prevent an `ArgumentError` when truncating backtraces with two identical
backtraces. (Systho, #2515, Benoit Tigeot, #2539)
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