bazel syntax: rename ASTNode to Node and SyntaxTreeVisitor to NodeVisitor

PiperOrigin-RevId: 269332155
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/Printer.java b/src/main/java/com/google/devtools/build/lib/syntax/Printer.java
index bcd144e..749b210 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/Printer.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/Printer.java
@@ -416,7 +416,7 @@
       } else if (o instanceof Class<?>) {
         this.append(EvalUtils.getDataTypeNameFromClass((Class<?>) o));
 
-      } else if (o instanceof ASTNode || o instanceof Location) {
+      } else if (o instanceof Node || o instanceof Location) {
         // AST node objects and locations are printed in tracebacks and error messages,
         // it's safe to print their toString representations
         this.append(o.toString());