Fix double printing

src/repl/Repl.kt

@@ -24,19 +24,21 @@ class Repl {
     }
 
     fun query(): Answers {
-        val queryString = io.prompt("?-", { "" })
+        val queryString = io.prompt("?-", { "|  " })
         val simpleQuery = parser.parse(queryString)
         val query = preprocessor.preprocess(simpleQuery)
+        Logger.debug("Satisfying query: $query")
         return query.satisfy(emptyMap())
     }
 
     fun printAnswers(answers: Answers) {
         val knownCommands = setOf(";", "a", ".", "h")
 
-        if (answers.none()) {
+        val iterator = answers.iterator()
+
+        if (!iterator.hasNext()) {
             io.say("false.")
         } else {
-            val iterator = answers.iterator()
             var previous = iterator.next()
             io.say(prettyPrint(previous))