Update src/main/java/com/hubspot/jinjava/JinjavaConfig.java

Co-authored-by: Jack Smith <72623970+jasmith-hs@users.noreply.github.com>

Author: jmoraleda

src/main/java/com/hubspot/jinjava/JinjavaConfig.java

@@ -224,7 +224,7 @@ public boolean isEnableFilterChainOptimization() {
    */
   @Value.Default
   public boolean isKeepTrailingNewline() {
-    return false;
+    return getLegacyOverrides().getDefaultKeepTrailingNewlineBehavior();
   }
 
   @Value.Default