Registers a block to be executed before examples.
scope can be :each (default), :all, or
:suite. When :each, the block is executed before each
example. When :all, the block is executed only once before any
examples are run.
# File lib/spec/example/before_and_after_hooks.rb, line 19
def append_before(scope = :each, &block)
before_parts(scope) << block
end
