class RSpec::Core::Configuration

`rspec_options` attribute of RSpec's rake task.
`--backtrace`on the command line, in a `.rspec` file, or in the
To override this behaviour and display a full backtrace, use

You can modify the list via the getter, or replace it with the setter.

installs) by default.
in any "bin" directory, and any of the rspec libs (outside gem
Excludes lines from ruby (and jruby) source, installed gems, anything

Regexps used to exclude lines from backtraces.

def backtrace_exclusion_patterns
  @backtrace_formatter.exclusion_patterns
end