Add documentation for cspecify

spec/guards_helper.rb

@@ -33,6 +33,17 @@ def Sequel.guarded?(*checked)
 end
 
 module Minitest::Spec::DSL
+ # Check all entries in +checked+, and mark them pending if they match. +checked+ entries
+ # support the following types of matching:
+ #
+ # Symbol: checks database type
+ # [Symbol] : checks adapter scheme
+ # [Symbol, Symbol] : checks adapter scheme and database type
+ # [Proc, Symbol] : Checks proc and database type
+ # [Symbol, Proc] : Checks adapter scheme and proc
+ # [Symbol, Symbol, Proc]: Checks adapter scheme, database type, and proc
+ #
+ # If any +checked+ matching returns true, then the spec is marked as pending.
  def cspecify(message, *checked, &block)
  if pending = Sequel.guarded?(*checked)
  it(message) do