Add YARD docs to Faker::Verb (#2008)

lib/faker/default/verb.rb

@@ -3,22 +3,67 @@
 module Faker
   class Verb < Base
     class << self
+      ##
+      # Produces the base form of a random verb.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::Verb.base #=> "hurt"
+      #
+      # @faker.version 1.9.0
       def base
         fetch('verbs.base')
       end
 
+      ##
+      # Produces a random verb in past tense.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::Verb.past #=> "completed"
+      #
+      # @faker.version 1.9.0
       def past
         fetch('verbs.past')
       end
 
+      ##
+      # Produces a random verb in past participle.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::Verb.past_participle #=> "digested"
+      #
+      # @faker.version 1.9.0
       def past_participle
         fetch('verbs.past_participle')
       end
 
+      ##
+      # Produces a random verb in simple present.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::Verb.simple_present #=> "climbs"
+      #
+      # @faker.version 1.9.0
       def simple_present
         fetch('verbs.simple_present')
       end
 
+      ##
+      # Produces a random verb in the .ing form.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::Verb.ing_form #=> "causing"
+      #
+      # @faker.version 1.9.0
       def ing_form
         fetch('verbs.ing_form')
       end