Added/updated snippets for docs (#2318)

docs/doc_examples/a159143bb578403bb9c7ff37d635d7ad.asciidoc

@@ -0,0 +1,19 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.indices.analyze({
+  tokenizer: "whitespace",
+  filter: [
+    {
+      type: "predicate_token_filter",
+      script: {
+        source: "\n          token.term.length() > 3\n        ",
+      },
+    },
+  ],
+  text: "the fox jumps the lazy dog",
+});
+console.log(response);
+----