[1455] aesthetic changes from review

whitespace, comments, log messages, typos

src/lib/dns/python/pydnspp.cc

@@ -230,7 +230,7 @@ initModulePart_Name(PyObject* mod) {
                      Py_BuildValue("I", NameComparisonResult::EQUAL));
     addClassVariable(name_comparison_result_type, "COMMONANCESTOR",
                      Py_BuildValue("I", NameComparisonResult::COMMONANCESTOR));
-    
+
     PyModule_AddObject(mod, "NameComparisonResult",
         reinterpret_cast<PyObject*>(&name_comparison_result_type));
 

src/lib/dns/rrset.cc

@@ -51,7 +51,7 @@ AbstractRRset::toText() const {
             getClass() != RRClass::NONE()) {
             isc_throw(EmptyRRset, "toText() is attempted for an empty RRset");
         }
-        
+
         s += getName().toText() + " " + getTTL().toText() + " " +
              getClass().toText() + " " + getType().toText() + "\n";
         return (s);

src/lib/python/isc/ddns/libddns_messages.mes

@@ -51,7 +51,8 @@ nonterminals.
 A DNS UPDATE prerequisite was not satisfied. The specific prerequisite that
 was not satisfied is shown. The client is sent an error response with the
 given rcode.
-In this case, the specific prerequisite is ''. From RFC2136:
+In this case, the specific prerequisite is 'Name is not in use'.
+From RFC2136:
 Name is not in use.  No RR of any type is owned by a
 specified NAME.  Note that this prerequisite IS satisfied by
 empty nonterminals.
@@ -66,7 +67,8 @@ the client.
 A DNS UPDATE prerequisite was not satisfied. The specific prerequisite that
 was not satisfied is shown. The client is sent an error response with the
 given rcode.
-In this case, the specific prerequisite is ''. From RFC2136:
+In this case, the specific prerequisite is 'RRset does not exist'.
+From RFC2136:
 RRset does not exist.  No RRs with a specified NAME and TYPE
 (in the zone and class denoted by the Zone Section) can exist.
 
@@ -74,7 +76,8 @@ RRset does not exist.  No RRs with a specified NAME and TYPE
 A DNS UPDATE prerequisite was not satisfied. The specific prerequisite that
 was not satisfied is shown. The client is sent an error response with the
 given rcode.
-In this case, the specific prerequisite is ''. From RFC2136:
+In this case, the specific prerequisite is 'RRset exists (value independent)'.
+From RFC2136:
 RRset exists (value dependent).  A set of RRs with a
 specified NAME and TYPE exists and has the same members
 with the same RDATAs as the RRset specified here in this
@@ -84,7 +87,8 @@ Section.
 A DNS UPDATE prerequisite was not satisfied. The specific prerequisite that
 was not satisfied is shown. The client is sent an error response with the
 given rcode.
-In this case, the specific prerequisite is ''. From RFC2136:
+In this case, the specific prerequisite is 'RRset exists (value dependent)'.
+From RFC2136:
 RRset exists (value independent).  At least one RR with a
 specified NAME and TYPE (in the zone and class specified by
 the Zone Section) must exist.

src/lib/python/isc/ddns/tests/session_tests.py

@@ -522,7 +522,7 @@ class SessionTest(unittest.TestCase):
         session = UpdateSession(msg, msg_data, TEST_CLIENT4, zconfig)
         # compare the to_text output of the rcodes (nicer error messages)
         # This call itself should also be done by handle(),
-        # but just for better failures, it is first called on itw own
+        # but just for better failures, it is first called on its own
         self.assertEqual(expected.to_text(),
             session._UpdateSession__check_prerequisites(self.__datasrc_client,
                                                         TEST_ZONE_NAME,
@@ -543,7 +543,7 @@ class SessionTest(unittest.TestCase):
         # It does test all types of prerequisites, but it does not test
         # every possible result for those types (those are tested above,
         # in the specific prerequisite type tests)
-        
+
         # Let's first define a number of prereq's that should succeed
         rrset_exists_yes = isc.dns.RRset(isc.dns.Name("example.org"),
                                          isc.dns.RRClass.ANY(),