Missing space before extends/implements using J.ClassDeclaration#withExtends and J.ClassDeclaration#withImpelements

WithMissPaddingReproducer.java

package org.openrewrite.java.tree;

import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.openrewrite.ExecutionContext;
import org.openrewrite.Recipe;
import org.openrewrite.Tree;
import org.openrewrite.TreeVisitor;
import org.openrewrite.java.JavaIsoVisitor;
import org.openrewrite.marker.Markers;
import org.openrewrite.test.RecipeSpec;
import org.openrewrite.test.RewriteTest;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import static org.openrewrite.java.Assertions.java;

class WithMissPaddingReproducer {

    static class ExtendWithArrayList extends Recipe {
        @Override
        public String getDisplayName() {
            return "ExtendWithArrayList";
        }

        @Override
        public String getDescription() {
            return "Trigger ClassDeclaration#withExtends(java.util.ArrayList) for testing.";
        }

        @Override
        protected TreeVisitor<?, ExecutionContext> getVisitor() {
            return new JavaIsoVisitor<>() {

                private final J.Identifier arrayList = new J.Identifier(Tree.randomId(),
                  Space.SINGLE_SPACE,
                  Markers.EMPTY,
                  ArrayList.class.getName(),
                  null,
                  null);
                @Override
                public J.ClassDeclaration visitClassDeclaration(J.ClassDeclaration classDecl, ExecutionContext executionContext) {
                    return classDecl.withExtends(arrayList);
                }
            };
        }
    }

    static class ImplementsSerializable extends Recipe {
        @Override
        public String getDisplayName() {
            return "ImplementsSerializable";
        }

        @Override
        public String getDescription() {
            return "Trigger ClassDeclaration#withImplementation([java.io.Serializable]) for testing.";
        }

        @Override
        protected TreeVisitor<?, ExecutionContext> getVisitor() {
            return new JavaIsoVisitor<>() {

                private final J.Identifier serializable = new J.Identifier(Tree.randomId(),
                  Space.SINGLE_SPACE,
                  Markers.EMPTY,
                  Serializable.class.getName(),
                  null,
                  null);
                @Override
                public J.ClassDeclaration visitClassDeclaration(J.ClassDeclaration classDecl, ExecutionContext executionContext) {
                    return classDecl.withImplements(List.of(serializable));
                }
            };
        }
    }


    @Nested
    static class WithExtendsTest implements RewriteTest {
        @Override
        public void defaults(RecipeSpec spec) {
            spec.recipe(new ExtendWithArrayList());
        }

        @Test
        void triggerIt() {
            rewriteRun(
              java(
                """
                package de.example;
                
                class CustomList {
                }
                """,
                """
                package de.example;
                
                class CustomList extends java.util.ArrayList {
                }
                """
              )
            );
        }
    }


    @Nested
    static class WithImplementsTest implements RewriteTest {
        @Override
        public void defaults(RecipeSpec spec) {
            spec.recipe(new ImplementsSerializable());
        }

        @Test
        void triggerIt() {
            rewriteRun(
              java(
                """
                package de.example;
                
                class CustomList {
                }
                """,
                """
                package de.example;
                
                class CustomList implements java.io.Serializable {
                }
                """
              )
            );
        }
    }
}