Minor fix on docs

Author: pitbulk

README.md

@@ -795,7 +795,7 @@ Main class of OneLogin Python Toolkit
 * ***get_settings*** Returns the settings info.
 * ***set_strict*** Set the strict mode active/disable.
 * ***get_last_request_xml*** Returns the most recently-constructed/processed XML SAML request (AuthNRequest, LogoutRequest)
-* ***get_last_response_xml*** Returns the most recently-constructed/processed XML SAML response (SAMLResponse, LogoutResponse). If the SAMLResponse was encrypted, by default tries to return the decrypted XML.
+* ***get_last_response_xml*** Returns the most recently-constructed/processed XML SAML response (SAMLResponse, LogoutResponse). If the SAMLResponse had an encrypted assertion, decrypts it.
 
 ####OneLogin_Saml2_Auth - authn_request.py####
 
@@ -823,7 +823,7 @@ SAML 2 Authentication Response class
 * ***validate_num_assertions*** Verifies that the document only contains a single Assertion (encrypted or not)
 * ***validate_timestamps*** Verifies that the document is valid according to Conditions Element
 * ***get_error*** After execute a validation process, if fails this method returns the cause
-* ***get_xml_document*** If necessary, decrypt the XML response document, and return it.
+* ***get_xml_document*** Returns the SAML Response document (If contains an encrypted assertion, decrypts it).
 
 ####OneLogin_Saml2_LogoutRequest - logout_request.py####
 

src/onelogin/saml2/response.py

@@ -757,9 +757,10 @@ def get_error(self):
 
     def get_xml_document(self):
         """
-        If necessary, decrypt the XML response document, and return it.
+        Returns the SAML Response document (If contains an encrypted assertion, decrypts it)
+
         :return: Decrypted XML response document
-        :rtype: string
+        :rtype: DOMDocument
         """
         if self.encrypted:
             return self.decrypted_document