Resolve "Make grammar(s) more concise"

Closes #40 (closed)

ragconnect.base/src/main/java/org/jastadd/ragconnect/compiler/Compiler.java

@@ -81,7 +81,7 @@ public class Compiler extends AbstractCompiler {
 
     if (optionPrintYaml.value()) {
       String yamlContent = ragConnect.toYAML().prettyPrint();
-      System.out.println(yamlContent);
+      LOGGER.fine(yamlContent);
       writeToFile(getConfiguration().outputDir().toPath().resolve("RagConnect.yml"), yamlContent);
       return 0;
     }