Doc. update

lib/reg_api2/sym_hash.rb

@@ -1,5 +1,9 @@
 module RegApi2
+  # Hash with indifferent access to its elements.
+  # Also have no difference between {String} ans {Symbol} keys. 
   class SymHash < Hash
+    # Forms data with indifferent access from specified source.
+    # @return [Object] Data with indifferent access
     def self.from(source)
       case source
       when Hash
@@ -17,14 +21,22 @@ def self.from(source)
       end
     end
 
+    # Returns true if the given key is present in hsh.
     def has_key?(key)
       key.kind_of?(Symbol) ? self.has_key?(key.to_s) : super(key)
     end
 
+    # Returns true if the given key is present in hsh.
+    def include?(key)
+      has_key?(key)
+    end
+
+    # Element Reference — Retrieves the value object corresponding to the key object. If not found, returns the default value (see {Hash::new} for details).
     def [](key)
       key.kind_of?(Symbol) ? self[key.to_s] : super(key)
     end
 
+    # Element Assignment — Associates the value given by value with the key given by key. key should not have its value changed while it is in use as a key (a String passed as a key will be duplicated and frozen).
     def []=(key, new_value)
       key.kind_of?(Symbol) ? self[key.to_s]=new_value : super(key, new_value)
     end