Consistent support for square brackets around named parameter

See gh-27716

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/NamedParameterUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,8 +37,7 @@ import org.springframework.util.Assert;
 /**
  * Helper methods for named parameter parsing.
  *
- * <p>Only intended for internal use within Spring's R2DBC
- * framework.
+ * <p>Only intended for internal use within Spring's R2DBC framework.
  *
  * <p>References to the same parameter name are substituted with
  * the same bind marker placeholder if a {@link BindMarkersFactory} uses