Cleanup WASM bindings generators so they all have a similar interface

PiperOrigin-RevId: 827965451
Change-Id: I657fc4d3a480fbc62124c84fe9ddc0900a91183f

wasm/codegen/generators/generators_test.py

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 from absl.testing import absltest
-
 from introspect import ast_nodes
 
 from wasm.codegen.generators import enums
@@ -51,13 +50,14 @@ class EnumsGeneratorTest(absltest.TestCase):
     .value("ALPHA", ALPHA)
     .value("BETA", BETA);
 
-  enum_<EmptyEnum>("EmptyEnum");
-"""
+  enum_<EmptyEnum>("EmptyEnum");"""
 
-    actual_code = generator.generate()
+    markers_and_content = generator.generate()
+    actual_code = "\n\n".join(markers_and_content[0][1])
 
     self.assertEqual(actual_code, expected_code)
 
+
 class FunctionsGeneratorTest(absltest.TestCase):
 
   def setUp(self):