Update documentation

lib/active_interaction/errors.rb

@@ -7,6 +7,8 @@ module ActiveInteraction
 
   # A small extension to provide symbolic error messages to make introspecting
   #   and testing easier.
+  #
+  # @since 0.6.0
   class Errors < ActiveModel::Errors
     # A hash mapping attributes to arrays of symbolic messages.
     #
@@ -15,17 +17,20 @@ class Errors < ActiveModel::Errors
 
     # Adds a symbolic error message to an attribute.
     #
+    # @param attribute [Symbol] The attribute to add an error to.
+    # @param symbol [Symbol] The symbolic error to add.
+    # @param message [String, Symbol, Proc]
+    # @param options [Hash]
+    #
     # @example Adding a symbolic error.
     #   errors.add_sym(:attribute)
     #   errors.symbolic
     #   # => {:attribute=>[:invalid]}
     #   errors.messages
     #   # => {:attribute=>["is invalid"]}
-    # @param attribute [Symbol] The attribute to add an error to.
-    # @param symbol [Symbol] The symbolic error to add.
-    # @param message [String, Symbol, Proc]
-    # @param options [Hash]
+    #
     # @return [Hash{Symbol => Array<Symbol>}]
+    #
     # @see ActiveModel::Errors#add
     def add_sym(attribute, symbol = :invalid, message = nil, options = {})
       add(attribute, message || symbol, options)