[2427] wording fix: removed redundant words

src/lib/dns/master_loader.cc

@@ -405,10 +405,9 @@ MasterLoader::MasterLoaderImpl::handleInitialToken() {
             isc_throw(InternalException, "No previous name to use in "
                       "place of initial whitespace");
         } else if (!previous_name_) {
-            callbacks_.warning(lexer_.getSourceName(),
-                               lexer_.getSourceLine(),
-                               "Ambiguous previous name previous name for "
-                               "use in place of initial whitespace");
+            callbacks_.warning(lexer_.getSourceName(), lexer_.getSourceLine(),
+                               "Ambiguous previous name for use in place of "
+                               "initial whitespace");
         }
         return (next_token);
     } else if (initial_token.getType() == MasterToken::STRING ||

src/lib/dns/tests/master_loader_unittest.cc

@@ -569,8 +569,8 @@ TEST_F(MasterLoaderTest, includeAndInitialWS) {
     EXPECT_TRUE(errors_.empty());
     EXPECT_EQ(1, warnings_.size());
     checkCallbackMessage(warnings_.at(0),
-                         "Ambiguous previous name previous name for use in "
-                         "place of initial whitespace", 3);
+                         "Ambiguous previous name for use in place of initial"
+                         " whitespace", 3);
     checkARR("xyz.example.org");
     checkBasicRRs();
     checkARR("xyz.example.org");