improve log

cmd/publish_source_replace.go

@@ -39,7 +39,7 @@ func aptlyPublishSourceReplace(cmd *commander.Command, args []string) error {
 
 	revision := published.ObtainRevision()
 	sources := revision.Sources
-	context.Progress().Printf("Clearing staged source list...\n")
+	context.Progress().Printf("Replacing source list...\n")
 	clear(sources)
 
 	for i, component := range components {

system/t06_publish/PublishSourceReplace1Test_gold

@@ -1,4 +1,4 @@
-Clearing staged source list...
+Replacing source list...
 Adding component 'main-new' with source 'snap2' [snapshot]...
 Adding component 'test-new' with source 'snap3' [snapshot]...